All Forum Comments
Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 19:51
Comment by Algernon posted on Pentax FF DSLR - confirmed at 10/10/2012 - 15:38
they look multi-coated
Comment by Algernon posted on Light Night Leeds at 10/10/2012 - 14:37
in the f/1.2 to f/2 range that's good wide open
An M42 Yashica is about the best I ever had
Comment by Algernon posted on SMC Pentax-DA 50mm f/1.8 at 10/10/2012 - 14:30
is out of focus.... better to try it outside. I wouldn't think
you'd see much difference.
To give you some idea of what to take and because I mentioned
how good this zoom was earlier in this thread.....
These are just some test shots taken F 28-80mm All at f/10.
JPG's only taken. No PP or sharpening just reduced.
The exif should be intact.
Can't post direct 1280 wide....
F 28-80mm All at f/10 (I use 1/3rd stops)
(The lens is good at 28mm f/3.5)
http://uppix.net/6/a/d/e26ce723962f39feaa7698b0be5d0.jpg
http://uppix.net/1/7/d/4a903c6886dbc26f726f31d2e9d16.jpg
http://uppix.net/0/f/9/f8ae727c396eb19bf047836493150.jpg
http://uppix.net/e/b/5/f1f98e0feeab896ec218f1afb48e8.jpg
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Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 13:25
this frame it's very purple at f/1.8
http://slrgear.com/reviews/showproduct.php/product/1519/cat/45
Ricehigh describes a quick way of carrying out focus adjustment
on AF lenses only here:
link
A very important point to note about LV....
LV is controlled automatically by the camera body, in doubled f-stops per step from wide opened, according to the brightness level as metered, but NOT according to the set Av by the user nor by the camera in Program mode.
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Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 11:00
a Canon EF 85/1.2 L USM shows it I don't think we can
complain.
http://toothwalker.org/optics/chromatic.html
Dean, be careful using AF in poor light or tungsten lighting
it's usually inaccurate. Try MF instead.
Edit: Matt posted whilst I was writing this. If you are
able to focus manually with a magnified LV that should be
OK... not quite spot on, but somewhere within the DOF
that your looking at.
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Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 10:36
lettering on it at 45deg to see if any of the lines of type
are in focus.
Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 10:05
better than old primes.... there aren't many new primes and
there are also some excellent old zooms such as the F SMC
28-80mm f/3.5-4.5 which is as good as most 28-35mm primes.
Apart from the LTD's most primes are very old designs.
I remember Practical Photography testing the F series and
the 28-80mm was so good in the centre wide open that there wasn't
much point is stopping it down. The edge performance graph
was also much better than the F 28mm f/2.8 which sells for
about £200 these days.
The latest shot in my portfolio of the bee was taken with
the 28-80mm.
I posted sometime ago a comparison of various lenses and
the kit lens held it's own, although better lenses are
available.
Comment by Algernon posted on Pentax DA50mm f1.8 new lens green fringing at 10/10/2012 - 09:00
they are as rare as hens teeth It's the 100mm f/2.8
with the apertures going in the opposite way to normal.
It's sold under several different brands. I managed to persuade
a collector friend to part with his mint copy a couple of years ago.
This is the Porst branded one:
http://www.flickr.com/photos/praktinafan/sets/72157625736442408/show/
And some extra info:
http://forum.mflenses.com/chinonflex-100mm-f-2-8-in-m42-mount-t18348.html
If Spotmatic's got one it must be good
I'm not selling mine by theway
Comment by Algernon posted on Chinon lenses at 10/10/2012 - 08:33


You've highlighted a lens I have yet to try, the SMC F 28-80mm f3.5-4.5. Oddly, the reviews on the "other" site don't suggest that it's any better than some that I've tried already...
Andrew
Not a very good review anyway.... they didn't have a
picture of a single twig in the middle of the frame
How do they come up with a value for money rating?
A prime for £1,000 or a zoom for £40 which is the best VFM