[rollei_list] Re: Identifying a strange Rollei TLR accessory : B-II Rf x 3,5 disc
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Mon, 25 Jun 2012 19:47:29 -0700
----- Original Message -----
From: "Harry Fleenor" <harry@xxxxxxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Monday, June 25, 2012 4:11 PM
Subject: [rollei_list] Re: Identifying a strange Rollei TLR
accessory : B-II Rf x 3,5 disc
At 05:33 AM 6/25/2012, you wrote:
Identifying a strange Rollei TLR accessory : B-II Rf x 3,5
disc
As seen on e-bay / Germany object #310409484514
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=310409484514
This is a tool used in adjusting the focus of the viewing
lens on
Rolleiflexes with a 3.5 lens that take that bayonetted
size.
Thank You
Harry Fleenor
Oceanside Camera Repair
909 Aviation Blvd #4
Manhattan Beach Ca., 90266-6241
310 374-6506
harry@xxxxxxxxxxxxxxxxx
That is extremely interesting. If I understand right
it is used on the viewing lens when setting focus. If so it
would shift the focus slightly from that at wide open
perhaps giving a better average match to the taking lens.
While these lenses are very well corrected they still have a
little spherical aberration and thus a little focus shift. I
wonder if the infinity stop is set for the taking lens wide
open.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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