Nikkor 20mm f2.8 AIS Manual lens Performance on Full Frame Nikon D700
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- Опубліковано 26 сер 2024
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are you sure you did not have lens correction in the f4 image? I understand sharpness and vignetting changes, however your image also shows different distortion, which is usualy not affected by aperture.
What you're trying to describe is the lens falloff. The smaller the elements, the greater the effect of falloff because photons are being collected more from the edges of the lens. When you use a smaller aperture the size of the glass becomes proportionately larger, you're working more with a pinhole effect.
@BurneyFM nope, this is not the case. In a lens that is not affected by "field curvature", the area that is in focus is planar and not curved.
Whats the craic lad! I have to say thank you for your reviews! I have just bought one of these but the af version and i totally agree with you, an amazing little thing! I use all older or vintage nikon lenses and people really piss me off counting pixels and nit picking. Nothing is perfect in this world and I love the quirks of the older lenses . If we were to be led by most reviews we would all be broke and maybe have one lens!
good man keep up the good work!
On the D7100, and the latest D500, to name but two, you have to set the focal length and widest aperture in the menu to get accurate read out of aperture.
I know what you mean about the manual and the precision workmanship. I've been using a Pentax 55mm 1.8 on a canon 5d mk II, with an adaptor that's chipped for AF confirm. The AF confirm through viewfinder makes a difference since, these modern cameras don't have the older split screen viewfinder to help. I recommend the adaptors with AF Confirm. Mine was cheap on ebay. Brad.
@BurneyFM ooh good question. that is something really for a lens technician to be able to tell you. but that is how i have seen all lens tests so far, they have never tested the lenses on a slightly curved plane.
@Hynee ah me thinks i need to do that. will try and figure that out
I got the same lens. The good news is the vignetting disappears on a crop sensor camera, and with the added 1.6 a sweet spot of 32mm is achieved.
If you think this lens is sharp you may be interested in the Nikkor 85mm f/2 AI-S. It's sharper at f/2 than anything I've ever seen, ever.
Nice to see a review on the 20mm, thanks
Regarding the incorrect aperture reading that you're getting:
on your NIKON camera MENU, if you go into the:
SETUP MENU..
Non-CPU lens data...
there are 3 settings that you have to input manually, because your DSLR cannot communicate with the older lens (no electronic chip in lens).
the setting at the bottom is for "Maximum aperture"
if you have a number of older lenses, you can save them as lens No.2, No.3, etc.
I have a NIKKOR 20mm 1:4 that I fixed myself to work on my D700...it's great!
Have you entered the lens' focal length and max aperture manually? That may be why it's misreading. You tell the camera the max aperture and it reads the selected aperture from the position of the aperture ring. (You enter the focal length to help metering.)
you must have gotten up pretty early this morning to do this haha
good stuff Dom!
your accent makes this video so much better. Really wanna get this lens for my 5D. Thanks for the info, especially visuals on the vignetting.
I like the built quality of AIS lenses, the manual focusing ring on those lenses just something!
isnt 2.8 on FX is equivalent to F4 on DX? is that the reason?
@johanneswingerlang good question, maybe the increase in production and demand, and also editing softwares that can add sharpness,,, i dont know
@bratvlad built quality really cant be faulted. and they have a good weight to them as well
@Anubispop2 thanks for that. still dont exactly understand what it means and googleing "planar" jjust gets me more confused. Lens technology is pretty tough to understand
@mr667 thats pretty much what all my videos have been, check the blog page linked above
Hi Dom, I know this video is about AiS lense but I found Nikon 20/2,8 (without any marking) for super price and I wonder how much is it different from a Nikon 20/2,8 D which cost like 3 times more. when I look at both the lenses, they seems pretty the same, only D version has a mark D on it. Do you think is the -no letter version- worth trying on my D7000? thanks very much for an answer! :)
Ah manual focusing, manual setting the aperture, manual manual manual.. delicious.
@Dombowerphoto thats probably due to my poor english. All was saying is that in a high quality lens, the area in focus is not curved ;) look up "Petzval field curvature" on wikipedia!
Taking photos of brick walls... Ken Rockwell mentions those people and when I saw this I had to laugh.
Umberto Amante you take advice from ken rockwell. one day you will laugh at that as well. lens tests are not exciting but very nessessary to assess the quality, strengths and weaknesses of a lens.
Dombowerphoto Yes, i agree. Even if most people see the photos they take with their phones as good enough we know that good enough is the enemy of excellent. I laugh at Ken Rockwell when he fusses over stupid things like changes to button layout and using the computer and I can tell he is a regressive who can't' understand that by definition to make something better will require making it different. Henry Ford said if he asked people what they wanted they would have asked for faster horses.
Lol that was pretty weird! The light at 2.8.
And damn, that's mega sharp... Can't really understand why the lenses more or less have got unsharper...
Isn't it problematic to assess the corner sharpness by using a straight wall? The Distance from the lens to the center of the wall is smaller than the distance from the lens to the peripheral areas of the wall. So there has to be a higher softness in the corners i think. This essentially effects the sharpness with higher apertures due to the small depth of field.
Its only old school if your young, to those who have shot Nikon for decades its a lens
For those who shot with Nippon Kogaku lens, this may be a young lens.