f-stop conversion factor for mount adapter?

Started Feb 18, 2013 | Questions thread
MightyMike
Forum ProPosts: 30,906
Like?
Re: f-stop conversion factor for mount adapter?
In reply to edhannon, Feb 18, 2013

Just to add to that most adapters that employ glass to maintain infinity focus are effectively teleconverters, i think most are determined to be 1.2x to 1.3x

-- hide signature --

Mike from Canada
"I am not a great photographer! God is a great creator! All I do is capture His creation with the tools He has provided me."
'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote :)'
http://www.michaelfastphotography.com/galleries/VP-BDI_3a.jpg
http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

selected answer This post was selected as the answer by the original poster.
Reply   Reply with quote   Complain
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow