All Forum Comments
Comment by Algernon posted on Thinking the Unthinkable??? at 22/08/2012 - 17:21
say MAGNIFYING because they also do the same item without
the magnifier.
Comment by Algernon posted on FS; Tenpa 1.36x magnifying eyepiece at 22/08/2012 - 17:11
You did an excellent job of capturing the performance
Comment by Algernon posted on Fous de Bassin (Water Fools) on Derwent Water. Part of the Lakes Alive Project 2012 at 22/08/2012 - 11:39
Comment by Algernon posted on FS; Tenpa 1.36x magnifying eyepiece at 22/08/2012 - 11:01
a blackline at 1/180th.
Infrared is OK at 1/180th.
Comment by Algernon posted on Pentax 500 FTZ help needed at 21/08/2012 - 18:44
This is quite a good tutorial on how best to
achieve sharp results.
http://blog.phaseone.com/2011/03/31/achieve-sharp-images-with-wide-angle-lenses/
-
Comment by Algernon posted on K-5 shake reduction with Sigma 10-20mm at 21/08/2012 - 18:37
edges on the 12-24mm better without it. The 10-20mm f4-5.6
is the one I have at present. Optically very little between
that and the Pentax.
No Nikon WA lenses have VR (SR) including the $2,000
14-24mm
http://www.nikonusa.com/Nikon-Products/Camera-Lenses/All-Lenses/index.page
Comment by Algernon posted on K-5 shake reduction with Sigma 10-20mm at 21/08/2012 - 17:46
on the internet) is absolute nonsense
The DOF at 1:1 pixel level is mm's so anything other than
a flat board is going to be comparing either two points
that are OOF or possibly 1 point in focus and the other
OOF..... also they pick objects that look nice on the
photo, but don't stretch the cameras or lenses.
This indicates the problems of focusing on just a single 2D
target:
http://www.slrgear.com/articles/focus/focus.htm
You have the same problems with the 3D target... no two
cameras will be focused on the same point and I doubt
if they do 10 test shots of each at every aperture
Non-UK banknotes and stamps are quite good for testing
purposes.
I use the Novoflex focusing rail that Imaging Resource
have on the top of their yoke. I normally take about
5 shots moving about 15mm between each and pick the
sharpest.
Comment by Algernon posted on COME ON PENTAX WHERES YOUR full-frame at 21/08/2012 - 11:57
Hi, Rob. A pal of mine who claims to be an "international bird expert" (and shortly to appear on Autumnwatch on TV, if he's to be believed) came across this thread and was eager to help but the image is no longer available. Any chance of sticking it back on to satisfy his curiosity? I'm sure he'd give you a positive ID.
From memory, it was a great shot, by the way.
Cheers
Al
on all our descriptions above
Comment by Algernon posted on What type of Hawk is this? at 21/08/2012 - 08:18


leave you with far less decisions to make!