Can't say enough about this awesome piece of crucial quipment to calibrate your lenses !
348024
This chart is the best ! I learned how to calibrate all my lenses on my own, so now with this chart I can do so with complete confidence that my AF will be on point every shot,
Thank you DSLRKIT, sincerely, Troy
4534856
I spent loads of money on  "top-of-the-iine" lenses for my Sony e-mount cameras.  By any standards, this lens is incredible.  I hate to say "for the money" because, it's just awesome period.  It's just that the price compared to what you get elsewhere that makes it such an insanely great find.  So here's the thing... put aside specs, measurements, brand bias, and whatever else you use to attempt to rate lenses without actually trying them.  Just put this thing on your Sony, use peaking for quick easy focusing, and you will have results you get with no other lens you probably own or will own.  This lens produces tack sharp subjects that pop out of an indescribably creamy smooth completely separated background.  I use other lenses when I need autofocus,  stabilization, or another focal length, but for the sheer creative pleasure, this and my Rokinon 135 are my absolute favorite lenses.
2473736
Great addition to any lens you buy for your scope.  Remember its 1.25-inch so make sure that's what your aperture size is.  This part just doubles any magnification you have.  Just put in it first, then pop in your lends and secure both.  Then, bang, your 10x lens is now 20x..  This is a must have for any telescope.
4524061
Love it!  Every camera should have one attached. No longer am I fighting to keep lit from distracting what I'm looking at. Fits nice and snug on my Canon T3i. Keep in mind, though, that if you have an articulating LCD, the eyepiece will have to be removed before you move the screen. However, if you're using the LCD as an info screen, no worries. The cup rotates around for right & left eyed people, too ;) .  Get one. Actually, get one for every camera you own.
2391088
First time I saw this lens changers and belt was at a wedding, a videographer had a belt with about 4 to 5 of these all over his waist, and he looked so comfortable with it, effortlessly changing lenses.
I thought long and hard if I should buy this system, the belt and the lens changers.. I'm extremely satisfied with the purchase, its so handy and useful. Its very easy to use, feels strong. I feel confident using this, that my lenses are safe and always at my reach.
1348533
It was really difficult to decide if It was really worth the 1 grand tag price for this lens, since there are viable options at half the price.

Well, I couraged up, and made the order.. my only comment is WOW WOW WOW!!!!!

This is an incredible lens!! I own a 18-200VR, a 35mm f. 2, and a 18-70 ( All are DX) on a D70 (a D300 on the way, ordered in adorama since amazon isn't accepting more orders at the moment) , and this 12-24, quality wise, just blows out any of my previous lenses!! Color accuracy, saturation, clarity, sharpness and build construction are in the WOW category!!! real masterpiece

I've had the 12-24 for a month now, and it remais glued to my camera!!! The 18-200 has been sitting on a lowepro bag waiting for action, but, quite simply, the 12-24 is such such a piece, that it won't be coming off the D70 for quite a while..

I have not had the chance to try the Tokina, sigma and tamron equivalents, so I can't make a sustained comparison, however, I can tell you this: If you got the money and have ample use for an ultra wide, then go for the Nikon with eyes wide shut!! If not, then I'd go for the Tokina (Check out Ken Rockwell's comparison on this lenses, very helpfull)

Is it worth it???? ABSOLUTELLY!!!
3979371
A while ago I purchased a Rokinon 85mm f/1.4 manual focus lens and while I love, love, love the quality of this lens it can be hard to focus. I installed an AF confirmation chip to the lens which helps but when shooting at f/1.4 the depth of field is extremely shallow. Nailing the focus can be very difficult.  I was almost ready to sell this lens and get the Sigma 85mm f/1.4 for the autofocus alone.  As a last ditch effort I decided to give the Neewer HD Viewfinder a shot. For the price I figured what the hey! I am so glad I purchased this loupe! Not only is focusing now a breeze I found the overall handling of my camera to be much better as well. I wear glasses and the huge eyecup is very comfortable. Looking at the 3x magnification makes if feel like you're looking at a huge movie screen vs a tiny LCD.

The only thing I don't really care for is the attachment on the Canon 60D.  When taped to the LCD you can no longer close the articulating screen. It's not a deal breaker for me because the benefits far out way this one little problem. I know there are attachment plates you can get that attach to the tripod mount so you don't have to put the loupe cover directly on the LCD but I haven't seen one that works with a grip yet.

If you're into video or even manual focus lenses I would definitely put this on the list of must haves to use with live view! It's totally worth the money and cost ways less than many other viewfinder/loupe products.
1123385
First let me start by saying that every lens has it's purpose. This lens is meant to be used for portraits and or close up photography.

For $28 this is hands down amazingly worth the buy! I just got it in the mail a few hours ago but the moment I opened the box I knew I was satisfied with my buy. I thought it's plastic but it's metal, solid and has weight to it. The image quality is definitely sharp enough. Unless your magnifying the image by 300% or more the sharpness is perfect. I've purchased this for my NEX-5N and it fits as should, tight and no wobble. I'm very happy I decided to buy this.

I recommend this for anyone looking for $300 lens capability at 1/10 the price. I'm putting the 50mm 1.4 they make on order right now, I can't wait!

UPDATE

Pictures only have adjustments made to crop, contrast, saturation, ambiance, warmth, and vignette. I didn't do any sharpening or blurring,I wanted to showcase what the lens can do. I'm VERY impressed!!
4299549
Extends the viewing capability of any telescope! This nifty thing was what I needed to make my telescope more powerful. Fits in perfectly in the slot and you can add almost any lens with this! Great Buy!
900133
Game changer. Ditch your kit lense and put this one on. You'll absolutely love it!
1267633
Supper clear glass no distortion or loss in image quality! A must have for all high end cameras to protect the lens!
3028648
This lens hood is a true must-have for the Canon 20mm

With the large front element of the lens, and the "not so nice looking" glare it produces when the sun hits it at the wrong angle, this lens hood is a real "must have" accessory!
2591857
An absolutely amazing product! The camera on my iPhone 5S is great, but this extra lens makes it phenomenal. The ability to get close up shots without having to zoom all the way in makes for clearer pictures every time. I use several different photo apps that don't allow you to zoom in at all, the zoom lens solves that problem. Solid construction, easy set up, and portability make this a must have!
2470231
Totally love this little gadget; my new favorite accessory. SUCH an amazing deal and takes great pictures. Glad I didn't shell out $200 for the other version of these lenses. The case itself is very smooth too and high quality; definitely an upgrade from the case I was using before.
1999239
This polarizer is absolutely amazing!
I am an amateur photographer, really just wanting to make use of my dslr for once, and this lens really does amazing things with the lighting!
The higher price is definitely worth it here with such an essential lens to have on hand to make day time photos really pop with color and a little more dramatic effect.
The case it comes with is also really nice, sturdy, and protective, so I can really just throw it in my bag and not worry about it getting damaged at all.
2450987
Best 'small' purchase I have ever made in supporting my photography hobby! For the price, this 5-in-1 reflector is a must have for all photographers alike. The build quality i'd say is an A-, though I don't know how it could be much better. Does the job perfectly! Strongly recommend!
4868456
I have been using this lens for a while now and didn't want to leave a review until I could give a full honest opinion. This lens is everything that I've dreamed of and at such an excellent price! The autofocus is lightning fast and accurate, it captures every color on the spectrum beautifully, the depth of field is gorgeous, overall it is just such an essential lens and I could not see myself without it.