タイトル『 Powersonic PS-6100F1 - 6 Volt/12 Amp Hour Sealed Lead Acid Battery with 0.187 Fast-on Connector >
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price:$12.25
PowerSonic
タイトル『 CLASSIC High Definition +1 +2 +4 +10 Close-Up Macro Filter Set + Pouch For The CANON EOS-50D Which Has Any Of These Lenses ( EF 50mm F1.8 II, EF 800mm f/5.6L IS) Or Any Other Similar Lenses + Exclusive FREE Complimentary Super Deal Micro Fiber Lens Cleaning Cloth >
price:$499.00
Sigma Corporation
Usually ships in 24 hours Core2Duoノートレビュー 's review (big, bulky, but sweet) 『I'm comparing this with the old nikon 50mm f1.4.
The first thing that jumps out if the size difference. The sigma is huge compared to the nikon. The sigma boosts a 77mm front filter thread size, which is pretty massive. The build quality seem decent. Nothing compared to new nikon's f2.8, but seems sturdy enough. The zoom action is smooth, but nothing to write home about. The zoom speed is a little finicky, but fast enough. Finicky in that sometimes in low light, it seems to get confused, more so than the nikon's. (only slightly).
The sharpness is quite amazing. I believe this is equally sharp to the nikon, and the brokeh is slighly better. (marginally).
The front lens hood is pretty useless and I shoot with that off.
Why choose this over the nikon? The pictures it produces seem to have a little more oomph. There seems to be a slightly high ratio of winners, those shots which are just magical, with the sigma. This comes at a cost of... higher price, and huge bulk. 』
(Not too heavy, no focus problems) 『I bought the Sigma 50mm F1.4 EX DG HSM Canon Version, paying full price without any sort of quibbling, on Nov 9, 2009. My philosophy is that since I bought this way I can expect the best support if needed. Turns out, I wish I hadn't waited so long to buy one!
I also got a Sigma 77mm DG UV filter to protect the front surface of the lens (also paying full price without quibbling). A side-comment about the Sigma filter: I noticed right away that the Sigma coatings on this filter are far better than the coatings on the Sunpak Sun 77 UV filter I had been using: a very deep look to the surface, indicating few if any reflections.
My camera is a Canon EOS 30D, which has the APS-C sensor (not full-frame). Fully expecting to send in the camera and lens for fine-tuning by Sigma, I tried a few simple focus tests at full f1.4 aperture. No problems! In fact, my best manual focusing was only equal to the autofocus results. If anything can be said to confirm focus problems reported by others, I would have to say that automatically and manually I got focus very slightly in front of the focus point, by an inch or two at a distance of 6 feet. This seems to be adequately within the depth-of-field of the lens at f1.4, and is as good as I have ever gotten with my other lenses. Focus at infinity seems just fine to me, at least with the particular Sigma lens I received.
On the downside, I noticed a small but practically insignificant variation in the autofocus results: I defocused manually, then refocused automatically, took a shot, and repeated a few times. I saw very slight variations shot to shot, but this is not a show stopper by any means. My guess is that I will see this variation in most any lens, but of course I haven't yet tried it on my other lenses. I think it has to do with how quickly focus movement ceases in the lens after correct focus is obtained (a matter of damping in the lens perhaps).
All of my tests were with the lens wide open since this will be the way I use it most of the time. For my tests, however, I also used a tripod for maximum camera stability, and I used the mirror lockup option so camera vibration would be minimal during the exposure. My best focus test was shooting an open matchbook on a piece of chicken wire, at an angle. The chicken wire showed clearly the limits of depth-of-field, and made it easy to see the center of focus.
My previous favorite lens was the Canon EF 24mm f1.4L USM (older model, not the new "II" version currently in the Canon product lineup). This is also a lens with a 77mm filter requirement, but 1/2" longer, twice the cost, and quite a bit heavier than the Sigma. I was surprised to find this Sigma lens so small and light by comparison! Based on the other reviews stating how surprised others were by the size and weight of the Sigma, I expected at least something as heavy as my Canon lens. Oops!
The nice thing about a heavy lens is that it sort of stabilizes the camera during the shot, when the SLR mirror flips up and down. With a "long" lens (the Sigma is about twice as long as my Canon 24mm) you need this stability even more, so in my opinion the Sigma lens is not heavy enough!
If you enjoy available-light photography, I think you will be delighted with this lens!』
(Not perfect... but excellent prime lens) 『I'm a photo hobbyist who likes to do my research. I purchased this lens 8 months ago and it produces great creamy bokeh when you're after shallow DOF. Solid construction, smooth matte finish. The AF is not dead-on and sometimes lingers, but that's what you can expect from the rebel's AF system. Manual focus + liveview fixes this. I never shoot wider than f1.8. At f1.4 the blooming is off the charts and you can't get any remotely sharp images. I got this lens to use with my APS-C camera as well with a prospective FF camera. Overall not perfect, but still one of my favorite lenses.』
(Sigma 50 mm vs Canon 50 mm F1.4) 『I had both Canon and Sigma 50mm F1.4. Both lens perform equally well over F2.0. However, the major usage of this lens is at F1.4. At F1.4, Sigma beats canon easily in terms of sharpness, bokeh, saturation and contrast. The build quality of Sigma is obviously much better than Canon's.
At F1.4, both lenses have front or back focus problem with different cameras. If used on Canon 5D II, it can be adjusted using AF microadjustment or sent back to the service centres for adjustment pertaining to that camera.』
(Thinking about Canon 50mm options) 『If you're looking at this, then you've probably decided on a 50mm or so prime lens, likely because the kit zoom lens is both slow and not very good quality. Here are the options for Canon:
Canon 50mm f/1.8 (version 2): It's inexpensive, very fast compared to any cheap zoom and exceptionally good for the price. On the down side, it's cheap feeling, noisy in focusing, and difficult to focus manually. You should buy at least this.
Canon 50mm f/1.4: A little bit faster, but that's a less important trait these days with good digital high effective ISOs. More importantly, it's robust, easy to use, with full-time manual focusing (you can just grab the ring even when it's autofocusing), and good image quality
Sigma 50mm f/1.4: More expensive than the Canon lens, but slightly better image quality wide open. It's a tough sell since the quality change isn't huge. But if the extra money and Sigma logo don't bother you, then go for it.
Canon 50mm f/1.2: Big money for that extra light-gathering ability. If you need this for photographing in a club, then you'll buy it. If you don't need it, it's too expensive and heavy to compete with the lenses above.
Another, used, option, the original Canon 50mm f/1.8 EF lens was sturdier and better built, but they're only available used and possibly abused. I own one and am happy with it. I have shot with the Canon f/1.4 as well and that's the lens that I'd buy today.』 『This large aperture prime lens with a standard focal length of 50mm is ideal for digital cameras. This lens has superior peripheral brightness and provides high contrast image even at the maximum apertures. It is ideal for several type of photography such as portrait, landscape and reportage. The molded glass aspherical lens elements provide excellent correction of chromatic aberration and ensure superior optical performance. The fast F1.4 aperture and rounded 9 blade diaphragm creates an attractive blur to the out of focus areas. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focus override.』 『Designed for Nikon digital SLR cameras, the Sigma 50mm f/1.4 prime lens is ideal for a wide range of applications, from landscape photography to portraiture. The lens offers an extra-large aperture that guarantees superior peripheral brightness, helping create sharp images with high contrast even at the edges. The molded glass aspherical lens, meanwhile, perfectly corrects for coma aberration to ensure that images look sharp and crisp against a nicely blurred background. And thanks to the integrated Hyper Sonic Motor (HSM), the lens enjoys a silent, high-speed autofocus system. Other features include a super multilayer lens coating that reduces flare and ghosting, a minimum focusing distance of 17.7 inches, and a maximum magnification of 1:7.4. As with all Sigma lenses, this 50mm lens carries a one-year warranty.
Specifications
Focal length: 50mm
Maximum aperture: f/1.4
Lens construction: 8 elements in 6 groups
Angle of view: 46.8 degrees
Number of diaphragm blades: 9
Minimum aperture: f/16
Minimum focusing distance: 17.7 inches
Maximum magnification: 1:7.4
Filter size: 77mm
Corresponding AF mounts: Nikon
Dimensions: 3.3 inches in diameter and 2.7 inches long
price:$267.00
Canon
Usually ships in 24 hours Core2Duoノートレビュー 's review (Great Lens !!!) 『The best lens I have ever owned. A new experience in night pictures...downtown scenes are easy...close ups on faces are good....』
(Canon 50mm lens options) 『If you're looking at this, then you've probably decided on a 50mm or so prime lens, likely because the kit zoom lens is both slow and not very good quality. Here are the options for Canon:
Canon 50mm f/1.8 (version 2): It's inexpensive, very fast compared to any cheap zoom and exceptionally good for the price. On the down side, it's cheap feeling, noisy in focusing, and difficult to focus manually. You should buy at least this.
Canon 50mm f/1.4: A little bit faster, but that's a less important trait these days with good digital high effective ISOs. More importantly, it's robust, easy to use, with full-time manual focusing (you can just grab the ring even when it's autofocusing), and good image quality
Sigma 50mm f/1.4: More expensive than the Canon lens, but slightly better image quality wide open. It's a tough sell since the quality change isn't huge. But if the extra money and Sigma logo don't bother you, then go for it.
Canon 50mm f/1.2L: Big money for that extra light-gathering ability. If you need this for photographing in a nightclub, then you'll buy it. If you don't need it, it's too expensive and heavy to compete with the lenses above. That said, it's an amazing piece of kit that I've been lucky to handle a few times.
Another, used, option, the original Canon 50mm f/1.8 EF lens was sturdier and better built, but they're only available used and possibly abused. I own one and am happy with it. I have shot with the Canon f/1.4 as well and that's the lens that I'd buy today.』
(Very nice prime lens) 『Having used zoom lenses for some time now it was inevitable that I would revert back to fixed lenses at some point. Rather than find fixed prime lenses restrictive I have found them to allow me more freedom. The infinite possibilities of a zoom have more often than not left me with too many choices and less time spent on composition. A fixed lens such as this one forces more careful composition and has yielded better shots. To anyone who is on the fence for this lens and may be considering a zoom lens I say get this one. You will not be disappointed.
The range of the lens down to f 1.2 is amazing. I shot at night with no flash and was amazed by the results. Ambient light, even moonlight, lit the shots clearly and with remarkable results. The bokeh with this lens is also amazing. Just open the lens all the way to 1.2 and start shooting. For me this is the true reason to get this lens. It's shallow depth of field and the results of this effect are simple amazing. taking portraits will give you very soft features around the face with nice tack sharp features where you focused.
The Canon 85mm 1.2 will yield even better results for portraits, but for more versatility I still recommend this lens. The 85mm is too telephoto for casual shooting. if you only get one prime lens make it this one.』
(This is a great lens) 『Detailed reviews are all over the net so I'll just make this one short.
I have had no focusing issues with my copy, purchased in August 2009.
Overall better image quality than the 1.4.
* Excellent flare control. * Very much usable from f/1.2 to f/1.8. * Sharper than the 1.4 from f/1.8 to f/2.8.
Cons:
* Price, would have been justified if it was sharper at f/1.2. * Not dust or moisture resistant.』
(Great lens; needed a little bit of lens microadjustment) 『I'm using this lens on a full-frame DSLR Canon 5D Mk2. The first couple of days, I was struggling with getting the right exposure for my shots. Generally, I noticed that (intended) focused area (using center focus, partial metering) were a bit underexposed and background lighting was typically overexposed--this happens on most aperture settings, not just wide open. Moreover, when viewing the image at 100% size, I noticed that I typically couldn't get the focus spot on. I have several Canon lenses and have never had any issues; I'm not a pixel peeper; and, whenever I hear about "back focusing" issues, I generally disregard them since most of these "issues" are due to users' inexperience and wrong expectations of the lens.
That being said, I've had years of experience shooting with fast prime lenses (20mm f/2.8, 24mm f/1.4 28mm f/1.8, 35mm f/1.4 and 50mm f/1.4), and the 50mm f/1.2 was the ONLY lens where I found focusing needing a bit of adjustment. Luckily, 5D Mk2 (and, EOS 50D) has lens autofocus micro adjustment function for the user to adjust the point of focus for lenses. In my case, I had to set +17 steps "backward." This adjustment thing is something new to me, and I really don't know what the number means. But, what's important is that, after this adjustment, I was able to focus and get the exposures with better results.
Aside from having to adjust the focus point, everything else about the lens is perfect; I love the the colors it produces, bokeh is ultra smooth, the build and feel is great, and even the hefty aesthetic pleases me. I would easily give this lens 4.75 out of five.』 『The EF 50mm f/1.2L USM is a peerless new standard lens featuring an ultra-large aperture for a narrow depth of field and soft background blur so loved by photographers everywhere. The EF 50mm f/1.2L USM is suitable for any shooting situation; its lens coating and construction are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. This high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L Series Lens.』 『The Canon EF 50mm f/1.2L USM lens is a peerless standard lens for Canon digital SLR cameras. The lens is suitable for any shooting situation, with a lens coating and construction type that are optimized to minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras. The lens also offers an ultra-large aperture that produces a narrow depth of field and the type of soft background blur so loved by photographers everywhere. The high-performance, weather-resistant lens delivers all the superb image resolution and contrast you expect in a Canon L Series lens.
Specifications
Focal length: 50mm
Maximum aperture: f/1.2
Lens construction: 8 elements in 6 groups
Diagonal angle of view: 46 degrees (with full-frame cameras)
Focus adjustment: AF with full-time manual
Closest focusing distance: 1.48 feet
Filter size: 72mm
Dimensions: 3.4 inches in diameter and 2.6 inches long
price:$80.04
Canon
Usually ships in 24 hours Core2Duoノートレビュー 's review (Favorite lens by far!!) 『This lens hardly ever leaves my camera. Its the perfect lens. Sharpness is superb and colors are amazing straight out of camera. Last weekend I shot a wedding using my canon 85mm 1.2, canon 70-200mm 2.8, 11-16mm ultrawide, my macro, and this lens. I probably had this on my camera 75% of the time. AMAZING for creative portraits!』
(delightful, especially for outdoor photos) 『I expect many people buy this as a "L" equivalent to a 50mm lens on a camera with an APS-C sensor. However, I use it with a full frame digital camera or with 35mm film, and for me, this is one of Canon's essential primes. Together with their 135mm f2L, and a good 50mm lens, the 35mm f1.4L completes the kit. The angle is sometimes too wide for good coverage with a single flash, and I almost never use more elaborate lighting setups, so I am typically left using this lens in natural light. It is best in those cases where you can get relatively close to the subject (else the background becomes overwhelming). As with all L lenses, it feels solid and produces excellent results. The crispness of the image all the way to the corner of the frame allows me to compose an image however I like without worrying much about optical 'sweet spots' in the lens.
I have also photographed urban settings with this lens -- Times Square at night; the ruins of the Renaissance ballroom at dusk. Such photos don't drive my photography but I take them sometimes for context or because an image strikes me, and this lens handles them beautifully.』
(My favorite L Prime Lens) 『I have this lens for very long time, and it is still one of the most frequently used L Prime for my assignment. Indeed, this lens has been very popular among commercial photographer who are doing full body portrait, in the particular market, this lens is often considered as premier portrait lens.
I will not go into the wisdom of using 35mm as a portrait lens since it is really up to the judgment of individual photographer.
In general, there are two type of people using this lens for professional purpose.
Former is people who are shooting architecture/landscape and latter is people shooting portrait.
While I do not use this lens much for commercial landscape photography purpose, I used this lens a lot for commercial portrait purpose.
For the particular type of model...very often female model, I often do the model interview with this lens alone to determine how well this model will work with my project.
This lens works really well with particular type of model. And since I worked with Far East market frequently on commercial/magazine assignment, this type of lens work out very well and indeed became workhorse of my production. You have to be mindful, 35mm focal length is bit tricky to do portrait. So, you have to be careful with type of model you are using.
It is also very useful for low available light situation, so I see some wedding photographer used them. Some of events photographer also love to use this for similar reason, and it seemed to work well with capturing child etc.
However, I only see limited satisfied amateur user of this lens... while I am teaching photography lesson.
It is may be because it makes very little economic sense for amateur user who are shooting landscape or family portrait. This 35mm lens focal length are well covered by many reputable L zoom lens including 16-35, 17-40, 24-105, 24-70 and other. All of them are excellent L lens, and will do wonder for the most of landscape or portrait project. Zoom lens actually makes better economic argument in many occasion.
As far as difference from L zoom lens concern, you won't notice much until you started to enlarge to considerable size.
To be honest, not all of my 35mm focal length shoot on commercial assignment used this prime lens either... and that is even for the people who shoot staged subject in studio. So, you can guess how often prime lens is used for journalistic type of photography.
So, be sure you need this particular lens or you will be disappointed.
Faster Aperture alone normally won't justify this lens.
But if you know you need this lens, and your assignment or project demand this lens. Why wait.
You really have to look at its performance when it is stop down to f2.8~f4 where many of money shot using this lens are created. For people who are not sure about taking plunge to the L prime lens, I strongly suggest to rent this lens for a week or more, so you will be sure you needed this lens for your particular style.
Major Advantage are:
1. F1.4 Aperture really help for low available light portrait situation, and ideal for indoor use. 2. Very nice portrait lens for particular type of production. 3. Work wonderfully on both full size sensor camera as well as 1.6x body. 4. Build quality is excellent 5. Very sharp, sharp enough to convince you that your L lens prime is worth the price. Very useful for spread or any other large assignment.
Major Disadvantage are:
1.Cost as much as L zoom lens that does not sit well for many people. 2.Prime lens is inherently limited as a workaround lens, so I wold go for L zoom lens if I have to choose lens on the travel. 3.35mm is not going to work well with particular type of people as head portrait lens, so if you are going to buy your first L prime lens for portrait purpose, it is might be safer to buy 50/f1.2 or 85/f1.2 』
(Amazing Lens) 『I just bought this lens 2 months ago because I wanted to use it to take pictures of my newborn son and 2 year old daughter. Prior to this, my 28-135 lens lived on my camera and was most often used to take pictures of my daughter in the house. I like to take pictures without the flash when ever possible, so I found that I was most often using it zoomed all of the way and I was always having to take a bunch of pictures just hoping that I could catch 1 or 2 when she was not moving so they would not be blurry. I was initially looking for a faster zoom lens but since I was taking so many pictures zoomed out, I decided to give a fast prime lens a try. So I decided to buy the 35 f1.4 in hopes of getting better pictures of my kids. I have not been disappointed. This 35mm 1.4 lens is so fast that in good light it will completely stop their movement and it will take nice pictures in low light and still autofocus with no problems. I am just an amateur and still have a lot to learn about photograpy but this lens has turned out some outstanding pictures already that I never saw with my mid level lenses that I initially bought with my camera. This lens has made me such a fan of fast prime lenses that I just orderd the 135 f2. Now I wish that I would have just bought this lens from the start instead of the zooms that will probably just sit in my camera bag until I decide to sell them.
Due to all of the negative comments on lens packaging from Amazon, I decided to buy it through Adorama. I paid about $20 extra at the time to do this but the lens came packed well.』
(The 35 f/1.4L is simply.....amazing.) 『Initially I used a 50 f/1.4 on my 40D, but it was a bit too close for my taste, after tons of research, I found that the 35 f/1.4L received amazing reviews so I thought I would try it out. This lens just smokes the 50 f/1.4 in sharpness, bokeh, colors and build quality. I don't even use my Speedlite indoors anymore because this lens is so fast. A lot of people say that the 24L would work better on a crop, but I think the 24 would be a bit wide for my taste...I'm really digging the normal focal length this produces (56mm on a crop camera). I'm not sure if I even want to upgrade to a FF now because the focal length is so great on a crop cam. All in all, if you want a well built, fast, contrasty prime, don't hesitate...its worth every penny.』 『The L-series professional f/1.4 wide-angle lens comes with an aspherical lens element to correct aberrations. The floating system enables high picture quality to be obtained over the entire focusing range. Autofocusing is quick and quiet with rear focusing and ring USM. Full-time manual focusing is also possible.』 『The Canon EF 35mm f/1.4L wide-angle lens is a terrific standard lens for casual photographers and photojournalists who value low-light capability and high performance. The lens--which hails from Canon's L series--is equipped with an aspherical lens element that helps correct aberrations and improve contrast and sharpness. The lens's floating focusing system, meanwhile, lets you enjoy sharp images throughout the entire focus range. Other details include a ring Ultra Sonic Motor (USM) that ensures quick and quiet autofocusing, a manual focusing option, and a 1-foot close focusing distance.
Specifications
Focal length: 35mm
Maximum aperture: f/1.4L
Lens construction: 11 elements in 9 groups
Angle of view: 63 degrees
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 1 foot
Filter size: 72mm
Dimensions: 3.1 inches in diameter and 3.4 inches long
price:$1,369.00
Sony
Usually ships in 24 hours Core2Duoノートレビュー 's review (Clarity or show off or WHAT? What are you saying?) 『Some fellow on this page reviewed this lens (Sony SAL-85F14Z ) without understanding the fundamentals of digital photography or optical geometry, saying, "since its 35mm equivalent focal length is nearly 130 mm".
This lens is an 85 mm lens for a 35 mm DSLR camera such as Sony Alpha A900 (and soon Sony Alpha A850. On their little sister, A700, it will be a 170 mm lens because A700 employs a half-frame AC type sensor. In that case it will act like middle focal length lens.』
(Worth it, worth it, worth it!) 『This lens is phenomenal. I was a bit hesitant about purchasing it simply due to price tag, but with a daughter on the way and with the sale of some other equipment, I was able to make it happen. This lens is amazing. My daughter is 3 months old now and I have taken 100s of professional quality photos.
Cons: - Heavy (which I consider a pro, due to the excellent build quality)
I highly recommend this lens. I also have the zeiss 16-80mm, and the sony 100mm 2.8. While both are great lenses, the 85mm zeiss rarely leaves my camera anymore.』
(Unbelievably Sharp) 『Sony's Zeiss Planar 85mm/1.4 is among the sharpest lenses I've ever seen. I've long been a fan of Zeiss medium format glass - particularly the Zeiss lenses for the Contax 645. Not only is this lens incredibly sharp, but somehow even captures a "medium format" look and feel.
Also recommended are Sony's Zeiss 24-70mm f2.8 Sony 24 -70mm f/2.8 Carl Zeiss Vario Sonnar T Zoom Lens for Sony Alpha Digital SLR Cameras and Zeiss 135/1.8 lenses Sony SAL-135F18Z 135mm f/1.8 Carl Zeiss Sonnar T Telephoto Lens for Sony Alpha Digital SLR Camera in an growing line-up of amazing Sony flagship lenses.』
(An excellent portrait lens) 『I am astonished by this lens, as well as its sibling the 135mm f/1.8 lens Sony SAL-135F18Z 135mm f/1.8 Carl Zeiss Sonnar T Telephoto Lens for Sony Alpha Digital SLR Camera. Each lens is razor sharp at its widest aperture. A discussion of this lens, as well as of the Minolta 85mm f1.4 lens, may be found at the Photozone site. Compared to the Minolta lens, this lens is sharper and exhibits less vignetting, although it does exhibit slightly more chromatic aberration but to no serious extent. 』
(Best portrait lens ever!) 『The sharpness creamy bokeh are unmatched by any other alpha mount lens. The auto clutch is a fine addition, since this lens has some heft to it, so you'll find yourself balancing the camera by the lens with your left hand. When it is in AF, the focusing ring doesnt turn. Nice. The colors are reproduced as true as any glass on the market. My only issue is minor, I wish the lens hood had a filter window, similar to the 70200SSM. Very fast focusing even in low light, but to really get the most out of it, mount it on the A700. It does tend to lag a tad in low light when mounted on the KM 7D.
You'll forget the hit to your pocketbook as soon as you print your first shot!』 『A brilliant lens for portraits, low light and midrange telephoto shooting. It's a beautiful piece of glass - and for intimate or low-light portraits, fashion shots, and quick candid photographs with superior visual accuracy, this professional lens will satisfy the most uncompromising demands. Its performance at fully open aperture is astonishingly precise - and its 35mm-equivalent 125.7mm focal length gives you sharp midrange close-ups and natural, distortion-free portraits at relaxed distances.』
『Flashpoint Ball Heads feature smooth operational movement and positive locking. Made of magnesium alloy, they are 30% lighter than standard materials and that's a real savings for photographers on the go. The quick release plate receiver has a safety catch to prevent accidental release of the Q.R. plate. Flashpoint Ball Heads are available in several sizes to accommodate the various needs of photographers』