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johnriley

Joined: 19th March 2002

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johnriley
Quote:
The 300mm lens does not exist! Why stop at the equivalent on a 35mm camera? It might be a 2000mm equivalent on a 10x8 camera So use 1/2000th sec. in that case
Actually it works the other way round, but always for a given magnification, not for a given focal length.

A standard lens on a Minox sub-miniature is a 15mm, but has the field of view of a standard lens, but because of the huge magnification needed is more in need of a tripod than a standard lens on your 10"x8" view camera. If you were making 10"x8" prints from both, in the case of the larger format it would be a contact print, in the case of the smaller one it would be an enormous enlargement.

Now don't get me started on depth of field again!

Comment by johnriley posted on Using 200mm lens query at 18/03/2009 - 10:51

johnriley
Quote:
Is this really true? I believe a 200mm lens is 200mm no matter what sensor size you have. So the 1/focal length rule should still apply.
Yes, and it's even in the instruction book. It is still a 200mm lens, but as stated already it has the field of view of a 300mm on 35mm, so 1/300 sec would be the minimum for reasonably sharp images.

Frankly I can't hold such a lens that steady though - it wavers all over the place - so I would go for as fast as possible, plus SR where available! Of course a sturdy tripod would be better....

Comment by johnriley posted on Using 200mm lens query at 18/03/2009 - 10:33

johnriley
I suppose with so many items appearing and such dire legal consequences when things go wrong (for eBay, PayPal or any similar company that tends to get held responsible for everything bad out there) they have in place lots of automatic filters that create alerts.

I would just put the items up for auction and leave it at that. They might do better than BIN. If you have fixed prices, why not list those on this forum first to see if there are any takers - the Pentax stuff anyway.....

Comment by johnriley posted on Paypal caution? at 18/03/2009 - 10:29

johnriley
Can we have the link to have a look at the listings? Perhaps we can see something relevant then.

Comment by johnriley posted on Paypal caution? at 18/03/2009 - 08:33

johnriley
You'll like this from Chambers's Dictionary then: worthy of reverence...honorific prefix.....[held in] awed respect.....

It just gets better!

Comment by johnriley posted on TITLES? at 18/03/2009 - 08:31

johnriley
Venerable is in the sense of extremely wise, and, of course, venerated (lauded above others)for that wisdom.

Don't listen to Wikipedia, whoever wrote that entry was not venerable enough.

Apologies to those who will now rush to their dictionaries again...

Comment by johnriley posted on TITLES? at 17/03/2009 - 23:53

johnriley
Most forums have a list of ranks, basically some fun names that change as people's post count increases.

This has been asked for for a long time because we just had Forum Veteran at 30 posts and that was it.

The new titles were created by me and the rest of the PU team in an ecxchange of messages that ended up with what we have now.

Over at another forum, high posters can reach the dizzy heights of Photographer and finally Iconic Photographer....I'm just plain old Admin over there.

Comment by johnriley posted on TITLES? at 17/03/2009 - 21:53

johnriley
The red cans because they stick more or less permamently. My prints tend to have quite a long life in use and I don't want them to peel off the board.

The blue can is intended for paper, not for thicker material like photographs.

Comment by johnriley posted on What does eveyone do with their photos? at 17/03/2009 - 16:51

johnriley
I have banned this user, so please just delete the message.

Comment by johnriley posted on Private messages on this site... at 17/03/2009 - 16:39

johnriley
Some Pentax FA and FA-J lenses have plastic mounts. They are not heavy lenses and they wear very well.

Comment by johnriley posted on DAL 50-200 at 17/03/2009 - 15:59

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