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johnriley

Joined: 19th March 2002

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johnriley
It all depends on context. A record shot of something should by definition be accurate, but a creative landscape could be open to free interpretation.

Comment by johnriley posted on Should we post-process? at 22/09/2009 - 15:20

johnriley
Quote:
Don't all AF lenses automatically register the focal length?
Possibly, even probably, but as I have had Pentax Ka bayonet lenses that do not, I was just being cautious in making that statement!

Also don't forget that some lenses from other manufacturers do sometimes register some information incorrectly. I must check the EXIF in that respect.

Comment by johnriley posted on Tokina 80-400mm Pentax KAF fit at 22/09/2009 - 15:17

johnriley
The lens arrived safely today, in totally mint condition.

The bayonet fit is smooth as silk, the AF snaps in at all focal lengths and of course the A setting on the aperture ring means the lens is totally compatible. The SR system also works correctly with it, without needing to be told what it is.

So far so good, I'll post some test shots when I can.

Comment by johnriley posted on Tokina 80-400mm Pentax KAF fit at 22/09/2009 - 14:26

johnriley
Many thanks mecrox!

Comment by johnriley posted on Weekly Competition #115 - Yun at 22/09/2009 - 12:39

johnriley
Any sensor. Film lenses allow light to exit at an angle towards the edges. This strikes film just fine, but pixels are in small pits on the sensor and the light scatters on the edge of the pits instead of hitting the pixel straight on.

A digitally designed lens has a telecentric design that makes sure light exits as close to 90 degrees as possible.

The edges of a film lens aren't used by an APS-C sized sensor, so this isn't so much of a problem. A Full Frame sensor could have a problem with some lenses.

Comment by johnriley posted on Pentax 645D Release Date at 22/09/2009 - 12:34

johnriley
Well you've made an excellent choice of scanner, but I don't fancy the thought of actually doing all that scanning.

Good luck!

Comment by johnriley posted on Nothing suitable from Pentax, so I've gone Nikon at 22/09/2009 - 08:55

johnriley
I'm still curious as to where the gold Spotmatic ended up. That's the one offered as a prize in the original Photo Technique in the mid 1970s.

Comment by johnriley posted on Pentax LX 2000 at 22/09/2009 - 08:52

johnriley
I suppose the trouble is that something like this is very desireable, but what would I do with it? If I used it it would deteriorate and not be a perfect collector's item any more. If I stored it then it would really have no function at all.

So I don't buy collector's versions, just cameras to use.

A shame as it is very desireable!

Comment by johnriley posted on Pentax LX 2000 at 22/09/2009 - 08:17

johnriley
Quote:
Aren't these all a little wide for landscapes unless you're looking for the ultra wide skies?
It depends upon the individual's style and vision.

The Pentax 12-24mm is also very useable for critical applications such as architecture, because of its excellent control of distortion. In this respect it's better than the 14mm and certainly better than the Sigma 10-20mm.

Comment by johnriley posted on Is width everything? at 22/09/2009 - 08:11

johnriley
Sorry, Tokina 11-16mm is what I meant.

The AP review of the Tamron 10-24mm was reasonably encouraging, at least as good as the Sigma 10-20mm.

Comment by johnriley posted on Is width everything? at 22/09/2009 - 00:11

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