All Forum Comments
Comment by johnriley posted on Samsung GX-10 Battery Grip In Stock £39 at 13/10/2007 - 07:05
The witching hour and also the closing time for our competitions, unless otherwise stated if things get delayed.
Comment by johnriley posted on Discussion : Weekly Competition No. 12 - "Hard and Soft" at 30/09/2007 - 13:09
Your pic was shot with a C***n ? ? ? ? ? ?
Comment by johnriley posted on Discussion : Weekly Competition No. 12 - "Hard and Soft" at 28/09/2007 - 23:02
Can Galoot now please do the necessary for the new competition?
Comment by johnriley posted on Weekly Competition No. 12 - "Hard and Soft" at 01/10/2007 - 10:24
So that would suggest that the lens release button has nothing to do with releasing an M42 adapter. Can anyone confirm this?
Does the Kood adapter have lens elements?
Comment by johnriley posted on M42 Adapter, help! at 24/10/2007 - 23:07
The best test is to see how the lens suits your own style of photography.
Comment by johnriley posted on Pentax A smc 100mm 2.8 at 23/09/2007 - 00:33
Comment by johnriley posted on Pentax A smc 100mm 2.8 at 22/09/2007 - 17:19
I have somewhere an article comparing the inexpensive Seagull TLR with the Nikon Nikkor 50mm lens and although the Nikkor is a much better lens the big prints from the Seagull were better.
Certainly the Hasselblad will knock spots off the Nikon.
Comment by johnriley posted on My stuff at 25/01/2008 - 20:01
Lenses have many more properties than sharpness. There are contrast, gradation, resolution and a host of other things.
However, in terms of resolution it is not necessary for a fine print at 16" x 20" to have as high a performance as it would be if the format were 35mm. In fact you get significantly better prints from say 6x6cm at this side with rather lower resolution figures. 16x20 inch prints would be challenging in 35mm terms and would need the very best lenses. Even then there would be a more obvious grain structure that would mar the smooth reproduction of tones.
A TLR Rollei lens might have a resolution of 32 lpmm and a SMC Pentax-M 50mm f1.7 might have a resolution of 96 lpmm. The former will give smoother sharper results whether it's projecting a slide or making a large print.
I hope describing things the other way round like this has helped to clarify it.
A Hassleblad Carl Zeiss 80mm lens might resolve 80 lpmm or more, so maybe that tells us something as well...
Comment by johnriley posted on My stuff at 25/01/2008 - 19:35
Get the wrong one and by the time you've filled it you might not be able to carry it very far.
Comment by johnriley posted on The Slingshot Bags at 23/10/2007 - 16:50


The grip is likely the same apart from the shape modification to the outer casing.