All Forum Comments
Comment by les posted on lenses designed for digital at 17/07/2009 - 07:35
Being a relative newcomer to photography, i still don't understand
why a lens designed for a digital camera needs to be quoted as having a crop factor compared to 35mm. Surely if it designed for the digital sized sensor no other dimension need to be taken into consideration.
confused am i
why a lens designed for a digital camera needs to be quoted as having a crop factor compared to 35mm. Surely if it designed for the digital sized sensor no other dimension need to be taken into consideration.
confused am i
Comment by les posted on lenses designed for digital at 14/07/2009 - 07:54
Thanks for the reply Mongoose,
By loosing infinity focus, is this because of the thickness of the adapter,if not why does this happen
By loosing infinity focus, is this because of the thickness of the adapter,if not why does this happen
Comment by les posted on Pentax Adapter at 21/04/2008 - 07:30
Hi ,
Has anybody heard of a Pentax bayonet to m42 male thread adapter, if so any info where to get one would be appreciated.
Has anybody heard of a Pentax bayonet to m42 male thread adapter, if so any info where to get one would be appreciated.
Comment by les posted on Pentax Adapter at 20/04/2008 - 11:49
Thanks for everybody's replies, i'll take them all into consideration, but i think the idea of just putting on the lens and seeing if the view i get through the viewfinder is ok is probably the one to go for'
Comment by les posted on Designed for Digital or not at 05/04/2008 - 16:55
As a newcomer, when i read about lenses, they always seem to say that for digital camera equivalent multiply by 1.5 in the case of the K10D, i.e a 70mm to 300mm is the same on a K10D as a 105mm to 400mm. So if the DA range is specifically designed for digital does this remove this multiplication factor, and if so is this lens equal to divide by 1.5 to convert to 35mm.
Comment by les posted on Designed for Digital or not at 05/04/2008 - 07:36
Thanks for the replies. I have looked closer and seen the 2 lines you are on about hefty1, thats that question answered. thanks again.
Comment by les posted on max aperture on Tamron 70-300 with Pentax K10D at 21/03/2008 - 19:19
Hi anybody out there,
As a relative newcomer to DSLR, can somebody explain why i can set the aperture on my Tamron to 4, and it stays there for all focal lengths, i thought there was a range i.e it should be 5.6 at 300mm. Also anybody know what happens inside the lens when you switch the macro switch.
If these questions have already been asked, apologies and point me in the right direction for the answers.
As a relative newcomer to DSLR, can somebody explain why i can set the aperture on my Tamron to 4, and it stays there for all focal lengths, i thought there was a range i.e it should be 5.6 at 300mm. Also anybody know what happens inside the lens when you switch the macro switch.
If these questions have already been asked, apologies and point me in the right direction for the answers.
Comment by les posted on max aperture on Tamron 70-300 with Pentax K10D at 21/03/2008 - 08:46
Best Regards
Les