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DPChallenge Forums >> Hardware and Software >> Used lenses: Nikon E 28mm 2.8 or Pentax-A 28mm 2.8
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08/21/2018 11:28:37 AM · #1
Your opinion would be appreciated :)

I would like to try an old lens on my Canon 70D.
I saw 2 used lenses for sell not too far from where I live:
- Nikon Series E 28mm f/2.8
- Pentax-A 28mm f/2.8

Both of them seem clean and without scratches.
I would have to buy an adaptor for both of them.

Which one would you pick and why?
How much would you pay?

Thanks a lot!
08/21/2018 12:00:09 PM · #2
Can't directly answer which would be better optically, since I haven't done any reading on the options. The Pentax lenses seem to be significantly less expensive on the used market. They seem to be going for less than $75 USD at KEH.com. There are several Pentax 28mm f/2.8 varieties, and I don't know for sure which you are looking at. The Nikon 28/2.8 Series E seems to go for about $140 to $150 USD in excellent condition (again referencing prices at KEH). These are retail prices, and KEH tends to be if anything conservative on their condition ratings, so I'd expect anything with an EX or EX+ rating to be pretty much pristine. For a private party transaction I would expect that you'd be able to discount these prices, perhaps significantly.

ETA: Using old glass on Canon is *fun*! I've got plenty of old stuff myself. Some is listed in my profile, and some is not ;-) I particularly like an old Steinheil macro lens originally made for Exakta. It's a 35mm macro that goes to 1.8x magnification. At maximum magnification, the subject is less than a quarter inch from the front element, making lighting, er, well, challenging! My most recent challenge entry was taken with it:
' . substr('//images.dpchallenge.com/images_challenge/2000-2999/2702/120/Copyrighted_Image_Reuse_Prohibited_1224257.jpg', strrpos('//images.dpchallenge.com/images_challenge/2000-2999/2702/120/Copyrighted_Image_Reuse_Prohibited_1224257.jpg', '/') + 1) . '

Message edited by author 2018-08-21 12:10:10.
08/21/2018 12:25:31 PM · #3
Hi Thoimir, I think Kirbic has some right-on-target info offered here. Here is my opinion, in a nut-shell.
The Nikon glass is by far the best glass available anywhere. Nikon optics are found on some of the most sophisticated instruments ever designed by man. (Hubble telescope, Space shuttle… to name a couple). If you are going to go forward and purchase one of these lenses, and then apply an adaptor to the lens, you’ve already killed the optics as they were designed.
At that point, it doesn’t matter at all which one you buy. They will be used in a way that they weren’t designed to be used.
Once you add the additional glass of the adaptor, you’ve changed your 2.8 speeds down to a 4.5. (For example). You are no longer shooting through the Pentax glass or the Nikon glass without the additional distortion of the adaptor. There are multiple downsides to this and I don’t see how it would improve the quality of your photography.
Sincerely, I hope this is helpful.

I wouldn't pay more than $30/$40 dollars for either of these lenses. (primarily because they don't fit my cameras and I would need an adaptor).

Alrighty.... Using old lenses is "FUN"
There is so much debate on what is art and even, what is photography.
If improving your "optics" is the goal, the adapter method is out the window.
If enhancing your artistic creativity is the goal..... everything I said above, is out the window.

i try to maintain a threshold of optical purity in my work, even when I'm being creative...... but sometimes the creative takes over completely. Then I just call it art.
I still wouldn't pay more than $30 - $40.00 for those lenses.

Message edited by author 2018-08-21 12:55:49.
08/21/2018 01:13:42 PM · #4
Originally posted by Gringo:

...If you are going to go forward and purchase one of these lenses, and then apply an adaptor to the lens, you’ve already killed the optics as they were designed.


Just a clarification here... Nikon lenses (and Pentax) adapted to Canon EOS require only a mechanical adpater, which has *zero* effect on optical properties. One of the advantages of the EOS mount (large diameter, relatively short flange distance (for an SLR). That said, of course adapting to mirrorless mounts is usually even easier!

Message edited by author 2018-08-21 13:14:07.
08/21/2018 02:34:18 PM · #5
Thanks Kirbic, I just learned something today!
I had no idea the adaptor for EOS has no glass.

Funny, I was thinking about this... I’ve seen ROZ and several other very respected photographers here actually turn their zoom lenses around and shoot them backwards to make some crazy macro type effects. “Optically impure” by my general standards, but no less than fantastic.
One day all my lenses are going to be “old” lenses. (Some of them probably already are).

Alright Thoimir: I’d buy both of them and sell the one you like least! ( for twice what You pay for it), because you didn’t pay more than $30 /$40.00 for them.
😁👍🏻
Then you get the best one for free!
08/21/2018 03:11:36 PM · #6
Originally posted by Gringo:

Thanks Kirbic, I just learned something today!
I had no idea the adaptor for EOS has no glass.


Ah-yep! You can do that if the flange distance on lens's native mount is longer than the flange distance on the target camera's mount. It also helps if the target camera's mount is larger in diameter. Example is mounting a Nikon lens on Canon. Canon's flange distance is 44.0mm, whereas Nikon's is 46.5mm. So you have 2.5mm to get a mechanical adapter into. A more challenging, but still doable adaptation is M42 to Canon; M42 has a flange distance of 45.46mm.

Originally posted by Gringo:

One day all my lenses are going to be “old” lenses. (Some of them probably already are).


Right there with ya!
08/21/2018 05:09:34 PM · #7
Thanks kirbic and Gringo for your inputs!

My goal is to try something else. Experiment.
To practice the manual focus, the manual aperture.
And the manual aperture would work well with my macro extension tubes :)

Yes, the adapter that I would buy doesn't have any glass.
https://www.amazon.ca/Nikon-Canon-Camera-Concept-Adapter/dp/B06X96JQJN
I assume that one would work with the Nikon lens?

kirbic, do you know how I can know which Pentax 28mm f/2.8 variety it is?
Here are some pictures I took with my cellphone:
https://drive.google.com/drive/folders/1MeNxBVW7zYUsHvpTiVndacsE2SC2djmM?usp=sharing

The film camera, the lens, a Vivitar flash and a bag is CAD$ 70.00.
I'm only interested in the lens, so I'll try to get it for less than that.
08/21/2018 06:36:15 PM · #8
I believe it is this one.
08/21/2018 07:11:56 PM · #9
Originally posted by kirbic:

I believe it is this one.


Thanks a lot, I'll take a look.
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