PentaxForums.com - View Single Post - Shooting the moon with 55-300 + 1.7x

georgweb · 01-12-2009, 03:19 AM

Daniel,
thanks for posting the pics. The moon is always good to compare lenses, although there are differences from full to half moon, like being mentioned, the position on the sky and the clarity of the atmosphere. Don't go to the astro people's sites, their moon shots are of course humbling :-)

Re. your question, yes, I think that Tamron lens is just not really appropriate for Tcon use (unlike your mentioned 90mm lens). Looks like the theoretical advantages from the TC are being outweighed by the losses here. This happened to me a lot of times with so-so lenses. I have had advantages from a Tcon with my best long lenses (fixed focal length) and best Tcon. Seems like a fast aperture helps (and then stopped down).

BTW what Tcon are you using?

Good intro: http://www.pentaxforums.com/forums/g...moonshots.html

Georg (the other)

01-12-2009, 03:19 AM	#7
georgweb Loyal Member Location: Berlin, Germany Gallery Photos: 2 Posts: 594	Daniel, thanks for posting the pics. The moon is always good to compare lenses, although there are differences from full to half moon, like being mentioned, the position on the sky and the clarity of the atmosphere. Don't go to the astro people's sites, their moon shots are of course humbling :-) Re. your question, yes, I think that Tamron lens is just not really appropriate for Tcon use (unlike your mentioned 90mm lens). Looks like the theoretical advantages from the TC are being outweighed by the losses here. This happened to me a lot of times with so-so lenses. I have had advantages from a Tcon with my best long lenses (fixed focal length) and best Tcon. Seems like a fast aperture helps (and then stopped down). BTW what Tcon are you using? Good intro: http://www.pentaxforums.com/forums/g...moonshots.html Georg (the other)