A Photography forum. PhotoBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PhotoBanter.com forum » Photo Equipment » 35mm Photo Equipment
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

20D (EOS) focus confirmation with non-canon optics

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old January 29th 06, 11:53 AM posted to rec.photo.equipment.35mm
external usenet poster
Posts: n/a
Default 20D (EOS) focus confirmation with non-canon optics

I have done some more reseach since originally posting this query and
receiving a very helpful reply. Two things have emerged.
Firstly it has been realised that the usefulness of enabling the focus
confirmation goes beyond just using old prime glass, it will enable the
camera to be focused easily when attached to an astronomical telescope. In
low light conditions this is always a problem. Secondly, I am reinventing
the wheel. A product is/was available from Germany, that is attached to
the camera side of an EOS/adaptor and it provides sufficient data to the
camera body to enable focus confirmation.

My partner in crime ( electronics tech and PIC micro programmer ) and I
wish to make a few of these devices as there is a growing number of
canon DSLRs in our astonomical society. We would prefer not to torture a
camera into giving up it's protocol secrets if we don't have to. If
someone else has already done the work and is happy to share the results,
their help would be greatly appreciated.

Ian Anderson


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sony V1 + Mercury Optics Wide Angle adapter 0,45X - focus problem TSK-TSK Digital Photography 5 December 12th 04 10:09 AM
Canon 20D Focus question Leith Cassone Digital Photography 0 October 28th 04 07:45 AM
CANON - The Great Innovator (was: CANON The Great Pretender) Steven M. Scharf Digital Photography 104 September 3rd 04 01:01 PM
Canon Digital Rebel: focus distance miscalculation? jd Digital Photography 0 August 22nd 04 09:03 PM
FA: Canon 15mm FD manual focus fisheye lens in excellent condition Jon 35mm Equipment for Sale 0 May 15th 04 02:34 AM

All times are GMT +1. The time now is 09:32 AM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2004-2022 PhotoBanter.com.
The comments are property of their posters.