[rollei_list] Re: In case anyone needs to get closer
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: "rollei_list@xxxxxxxxxxxxx" <rollei_list@xxxxxxxxxxxxx>
- Date: Sat, 8 Mar 2014 18:09:43 -0300
I'm glad you have one of these adapters, John; they are rare indeed, I
think you payed an excellent price. I did not find this adapter in
Prochnow's books, but I found it in a Rollei brochure. It works fine
the same way a Rolleikin works fine, because the best part of the lens
is used only.
This is a very interesting CZ article about manual lenses used on AF
cameras, the right fousing screens replacements for manual focus in AF
cameras (digital or film) are suggested:
http://lenses.zeiss.com/camera-lenses/en_de/website/photography/what_makes_the_difference/manual_focusing.html
Carlos
2014-03-08 15:12 GMT-03:00 John Wild <JWild@xxxxxxxxxxxxxxxxxxxxxx>:
> Carlos,
>
> I managed to find one of those adapters on Ebay. The seller did not know what
> it was and so did not describe it properly - I think he called it "a Rollei
> extension ring". That was to my advantage because, from the photo, I
> immediately knew that it was a sl66 to QBM adapter. I bought it for £45 which
> I thought was a good price. I think the list price had been about £800.
> Rollei Fototechnic did have a new one at the time because I asked about some
> other accessories that they still had available. I did see another of these
> adapters that had been butchered to convert it to a Hasselblad to QBM
> adapter. The price asked was about £800 from memory.
>
> It is used as the extension focusing helical for the SL66 lens. The image is
> of good quality because it is only the centre portion of the lens that is
> used. I have also tried it on my Canon 400D using a QBM to Canon digital
> adapter - the SL66 adapter is larger diameter than the thin adapter to the
> Canon digital and so it was very difficult to get separated afterwards
>
> I have found that using any QBM lenses on the Canon digital it is difficult
> to focus because the screen on the Canon is not designed for manual focus.
>
> A focus confirmation adapter is not technically possible for QBM to Canon
> digital because of the position of the QBM stop down pin. I have thought
> about buying a focus confirmation chip and trying to fit it to the adapter
> by rotating the lens position. This is still in my 'project requiring further
> thought' folder! I did see a QBM to Canon adapter advertised with focus
> confirmation but the photograph did not look as if it was a QBM fitting. I
> did a quick search and did not find one made in China but someone may be
> producing one now.
>
> John
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