Manual Focus Forum

I know the problem of your friend, I started with Minota SLR-camera's in 1966. Some lenses - most older ones - can be converted for use on Canon EOS or Sny Alpha. Only manual aperture.
May be a better policy is to convert a Canon camera mount: see
http://digitalrokkor.altervista.org/
The lense can be used without conversion, but the body is than not to be used for Canon mount lenses.
Using the MC/MD-lenses with optical converter is not an option when fast lenses has to be used wide open and nothing for wide angle lenses. Haoda converters etc deliver 1.2x TC effect costing a half stop and soften the image strong. Original Minolta converter is somewhat better but 2x TC effect, costing 2 stops.
I use a converter without glas (smal extension tube) for macro and have not yet converted any of my MC/MD-lenses. I keep them on film bodies sofar.

Last edited by Minolfan (2008-05-17 21:07:14)

Most Olympus DSLRs can use Minolta MD lenses with the aid of a mount adapter (no corrective lens).



Picture shows my E-500 with MD Rokkor f1.4 50mm and MD Zoom f3.5 24-35mm mounted. The adapter was purchased on eBay (Rong Jin) for GBP29.82 including postage. As shown a small Allen key is supplied to secure the lenses to the adapter but the fitting procedure is very simple.

Focal length is multiplied x2 so these lenses become a 100mm and 48-70mm respectively. The photo below was taken using the MD Zoom.



No in-built focus confirmation is available with the E-500 but I believe a focus confirmation chip is now available which could be fixed to the adapter.

dwright wrote:

Most Olympus DSLRs can use Minolta MD lenses with the aid of a mount adapter (no corrective lens).

http://farm3.static.flickr.com/2420/222 … 808910.jpg

Picture shows my E-500 with MD Rokkor f1.4 50mm and MD Zoom f3.5 24-35mm mounted. The adapter was purchased on eBay (Rong Jin) for GBP29.82 including postage. As shown a small Allen key is supplied to secure the lenses to the adapter but the fitting procedure is very simple.

Focal length is multiplied x2 so these lenses become a 100mm and 48-70mm respectively. The photo below was taken using the MD Zoom.

http://farm4.static.flickr.com/3108/249 … edc39a.jpg

No in-built focus confirmation is available with the E-500 but I believe a focus confirmation chip is now available which could be fixed to the adapter.

why was there an allen key needed?

dwright wrote:

Most Olympus DSLRs can use Minolta MD lenses with the aid of a mount adapter (no corrective lens).

Picture shows my E-500 with MD Rokkor f1.4 50mm and MD Zoom f3.5 24-35mm mounted. The adapter was purchased on eBay (Rong Jin) for GBP29.82 including postage. As shown a small Allen key is supplied to secure the lenses to the adapter but the fitting procedure is very simple.

Focal length is multiplied x2 so these lenses become a 100mm and 48-70mm respectively. The photo below was taken using the MD Zoom.

No in-built focus confirmation is available with the E-500 but I believe a focus confirmation chip is now available which could be fixed to the adapter.

Now question. I have a 58mm rokkor f/1.4 MC. Does the MC and MDs fit the 4/3s Olympus 4/3s DSLRs? I'd love to use this lens and try it out when my E-420 comes

Any ideas on how to change infinity on Minolta lenses?
Specifically, an MC Rokkor PF 1.7/50 ?
I plan to convert it to PK.
The easiest would be to use the existing bayonet.
The lens goes easily into a K100D (handheld) and the test pics look promising.
An added ring which I'd have to cut out of say 1,5mm aluminium could fit into this bayonet (and fixed with screws or glued onto it) and have the outer dimensions of the PK-bayonet.
Just the infinity..
This would basically be the same conversion as with the C/Y lenses discussed here before.
Georg
PS: Nice overview: http://members.aol.com/xkaes/mounts.htm
Edit: Removed the focus rubber this morning, no screws under it

Last edited by georgweb (2008-05-27 13:35:31)

You may be thinking of one of the Russian multi-adapters. For the 4/3 Minolta adapters from Cameraquest and other eBay vendors, the Allen key is required for a single set screw; from what I've read it is as solid as any other mount adapter. Because the Olympus 4/3 system has the shortest flange distance of dSLRs, it can take Minolta (or virtually any) MF lenses without reconstructive surgery.

Hello again,

just an update on how far I've come so far in trying to convert a Minolta MC Rokkor-PF 1.7/50 to Pentax K,
http://www.flickr.com/photos/26544190@N06/

Yes you can change infinity from the front (I need +2mm, approx 30°),
Pic #2 loosen outer screws. I just managed about 8° turn, then it stops.

pic2

It is stopped first from the guidance lever resting against the helicoid (pic #5 bottom left, guidance with 3 screws).
This could be fixed by grinding/sawing the helicoid out a little further.
But: Looks like it would not come out further cause then there is the aperture mechanics on the bottom of the bayonet, pic #5 bottom right.

pic5

So far so good (or not)
Georg
edit PS: Checked the infinity on a K100D with a mock-up setup, seems to be very close to the mirror (got the infinity just before slapping occurred)

Last edited by georgweb (2008-06-11 14:06:04)

dickb wrote:

I've got three glassless Minolta SR to Eos adapters. Two of them are easy to use thick macro adapters and one more fussy thin adapter that falls around the Minolta mount, adding no extra distance. With this adapter, you only get the 0,5mm difference in register, so longer telephoto lenses can be focussed to infinity but wideangles can't.

Where did you got the thin one !?
Thanks !!

I used Rokkor 50/1.4 on my OLYMPUS E-330 through universal adapter:



http://oly43club.ru/forum/index.php?showtopic=311


OLYMPUS E330 + Minolta Rokkor 50/1.4
f/1.4

Last edited by _VR_ (2008-06-16 09:52:18)

Which lens are you using, wee_ly?

edit: I see it says now (or I missed it originally). Great results.

Last edited by cvig (2008-06-30 00:44:31)

OLYMPUS E-330 + Minolta Rokkor 50/1.4

http://forum.manualfocus.org/viewtopic.php?id=10897