NikonGear'23

Gear Talk => Lens Talk => Topic started by: Snoogly on March 11, 2021, 08:17:41

Title: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Snoogly on March 11, 2021, 08:17:41: I purchased an optically lovely Meopta Meostigmat 1/50 lens, but have discovered it doesn’t work on my D750. I have the correct combination of clamps, rings, and focusing helicoid, but it’s all just a blur for anything not just a few cm in front of the lens.

I think I cocked-up, right? To make it work needs major surgery?

The eBay seller doesn’t accept returns, so I think I am stuck with it - unless someone wants to take it off my hands!
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: rosko on March 11, 2021, 09:00:49: Are you sure you have determined the right register distance ?

The lens is probably still too close from your camera sensor. If you have a bellow, you can try to pull the lens until you get a sharp image.
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Dr Klaus Schmitt on March 11, 2021, 09:47:47: This one is a very special lens which needs quite some mechanical modification to make it work. The rear optical group needs to be taken out, the rear barrel shortened and made smaller, optics group reinserted and glued in or fixed with three set screws (as the barrel has been changed). Needs a skilled mechanic (I have one). THEN it will work even to infinty (but ONLY on mirrorless cameras, not DSLRs with their massive 46.5mm register length). Anyway not a good lens to start with honestly....

Get a 1.4/70mm - much easier to use and a top lens for portraits especially! Or even a longer focal legth, the 1.7/100mm or 109mm, superb lenses but 62.5mm diameter. The latter longer ones can be adapted to those old DSLRs.

You can find results of all them here: https://www.flickr.com/photos/kds315/albums (https://www.flickr.com/photos/kds315/albums)

Results with Meopta 1.0/50mm are here: https://www.flickr.com/photos/kds315/albums/72157689252505212 (https://www.flickr.com/photos/kds315/albums/72157689252505212)

(https://live.staticflickr.com/4651/38715979045_22174a0639_o.jpg)

(https://live.staticflickr.com/4803/46301631141_370ff1ea02_o.jpg)
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Snoogly on March 11, 2021, 10:01:34: So at least I happy I did actually cock-up 100%!

If anyone wants this (ideally in Japan, but not limited to), let me know!

:-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[ :-[
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Airy on March 11, 2021, 21:51:45: Good results, esp. considering the aperture : the pics are pleasant overall, while some decent sharpness level is reached in the middle.
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Snoogly on March 12, 2021, 00:59:37: Quote from: Airy on March 11, 2021, 21:51:45
Good results, esp. considering the aperture : the pics are pleasant overall, while some decent sharpness level is reached in the middle.

Would you like my lens? ;-)
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Airy on March 12, 2021, 14:27:53: No, but only because I have not switched to mirrorless (yet). Besides, I broke the bank buying another hard-to-find lens earlier this year (VoigtLänder 180/4). Do not tempt me!
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Dr Klaus Schmitt on March 13, 2021, 21:52:02: Quote from: Airy on March 12, 2021, 14:27:53
No, but only because I have not switched to mirrorless (yet). Besides, I broke the bank buying another hard-to-find lens earlier this year (VoigtLänder 180/4). Do not tempt me!

Since when would EUR100 for a converted lens "break the bank"? ;-)
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Snoogly on March 14, 2021, 00:25:58: It’s a shame it’s just sitting here, looking sad and naked :-(
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Dr Klaus Schmitt on March 16, 2021, 09:00:05: Get a mirrorless camera and you have a chance to use it...
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Snoogly on March 16, 2021, 10:48:35: Actually, by trading in a bunch of stuff at mapcamera, a Z5 will be heading my way as soon as they have processed my donations.

What will be involved to make it mirror friendly, without major surgery?
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Erik Lund on March 16, 2021, 13:24:23: Quote from: Snoogly on March 16, 2021, 10:48:35
Actually, by trading in a bunch of stuff at mapcamera, a Z5 will be heading my way as soon as they have processed my donations.

What will be involved to make it mirror friendly, without major surgery?

This is a good start point:

https://nikongear.net/revival/index.php?topic=9130.msg151598#msg151598
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Dr Klaus Schmitt on March 16, 2021, 17:21:32: Unfortunately NOT, lens surgery needs to be done even at 18mm back focal length...
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Dr Klaus Schmitt on March 16, 2021, 17:29:51: Here is a FB group dealing especially with this:
https://www.facebook.com/groups/2161767920526039/ (https://www.facebook.com/groups/2161767920526039/)
Title: Re: Well, I cocked-up and bought a 50mm Meopta projector lens
Post by: Erik Lund on March 17, 2021, 10:32:42: Quote from: Dr Klaus Schmitt on March 16, 2021, 17:21:32
Unfortunately NOT, lens surgery needs to be done even at 18mm back focal length...
Yes, major surgery depending on infinity or not, you need to trim the lens down that was clear, but then you add a mount and or adapter like in the thread above.
Often for instance such lenses can be modified for 52mm threads as an intermediate step to adapt to different lens mounts,,,
Here info on spare Z-Mount for lens:
https://nikongear.net/revival/index.php?topic=9879.0 (https://nikongear.net/revival/index.php?topic=9879.0)