BHS Portrait - 600mm (1 img)

Started Apr 26, 2013 | Discussions thread
Forum ProPosts: 11,039Gear list
Re: @ Chris Mak...
In reply to brandrx, Apr 28, 2013

brandrx wrote:

Bighorn sheep - Both of the 2X TC's would autofocus and indicate locked focus but the resulting images were terribly out of focus.

My verdict - Sigma 500/4.5 + any 2X teleconverter is NOT recommended by me.

Interesting as the original Bigma will Auto-focus pretty well with the Sigma matched 2x converter.

Only real issue is the drop in contrast but that can be fixed in PP.

Theres obviously more to this than F-stop alone.

I see the same contrast drop in your 300 + 2x shots

Hand-held AF 500mm + 2x

AF 500m 1.4x



-- hide signature --

Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

 awaldram's gear list:awaldram's gear list
Pentax Q Pentax K-3 Pentax smc DA* 55mm F1.4 SDM Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM Pentax smc DA* 50-135mm F2.8 ED (IF) SDM +11 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow