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johnriley

Joined: 19th March 2002

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johnriley
Unfortunately zoom lenses are not the best candidates for maintaining quality when usinc TCs.

Also, you lose light and therefore need higher ISO settings to avoid camera shake.

The whole premise of a TC is a losing battle and most of the results are dire. Having sdaid that, there are some very expensive dedicated TCs that do offer high quality. They cost as much as an expensive lens though.

Comment by johnriley posted on Prime? at 06/04/2011 - 12:12

johnriley
Anyone who has tried flower and insect phoitography knows that the OP is just posing a question to stimulate discussion.

Anyone can take a flower or insect photograph, but it takes real skill to make a really good image.

Comment by johnriley posted on Pictures of flowers and insects at 06/04/2011 - 12:08

johnriley
Even if that's true, that would cause vignetting, whgich is a different thing altogether.

Comment by johnriley posted on I was begining to doubt the K-5 at 06/04/2011 - 10:58

johnriley
The trouble is that it isn't proved. All that is proved is that exposure systems don't read very wide apertures properly, which we have always known. The f1.2 lens on film cameras does not give accurate exposures at the extremes of its range, but the extra light gathering power is obviously there.

You can't cheat Physics.

Comment by johnriley posted on I was begining to doubt the K-5 at 06/04/2011 - 10:41

johnriley
You might think a 60mm lens (90mm equiv) would be ideal for portraits, but there aren't many of those about.

Anything that approximates a short telephoto is usually usable. On digital, 50mm - 100mm lenses should be fine. Many will like the 70mm or 77mm Limited, but the 100mm macro has a wider range uf uses.

Comment by johnriley posted on Portrait Lens at 06/04/2011 - 10:38

johnriley
Quote:
Because digital sensors only see about f/1.8 regardless of how wide the lens is
I have seen similar claims before, but no satisfactory proof that such a phenomenon exists. If we let more light in, how can a sensor or film not see it?

Comment by johnriley posted on I was begining to doubt the K-5 at 06/04/2011 - 10:32

johnriley
He's Jake the Peg, with his extra leg...

Comment by johnriley posted on Caption competition at 05/04/2011 - 23:41

johnriley
Please note it's against forum rules to publish the content of PMs or e-mails.

Comment by johnriley posted on FS: For Sale Pentax DA 21 and DA 70 at 05/04/2011 - 23:26

johnriley
Very nice indeed, but I don't think I could hand hold it.

Comment by johnriley posted on Who needs a big white one? at 05/04/2011 - 18:39

johnriley
Quote:
Does anyone have any issues with a polarizer when using a wide angle lens.
Yes, everyone, for the reasons stated. The effect will reduce when there is less polarised light.

Comment by johnriley posted on Ultra wide photography guide, please... at 05/04/2011 - 18:38

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