Comments made by johnriley - Page 1373

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A very large percentage of photographers tilt their horizons.

To understand why rotating anti-clockwise to correct it is quite common, just think which way we push the camera by pressing the shutter release...

Comment by johnriley posted on Wonky Horizons at 23/09/2010 - 00:13

You're better off putting your link under "My Website" on your profile - it will still be available then long after this thread has been submerged by later ones.

Comment by johnriley posted on Worldisround.com at 23/09/2010 - 00:05

Surely 3dB. Liogarithmic scales work on units of 3 for a doubling. That's why a 200 ISO film is 24 DIN and a 400 ISO is 27 DIN.

Comment by johnriley posted on Official K-5 specs !!! at 22/09/2010 - 08:02

The Fovean sensor is logical in its construction in layers - very similar to the construction of a colour film.

Sadly, performance has not so far been noteworthy and for whatever reeason only Sigma, a small player, have taken it up.

It's worth continuing to watch.

Comment by johnriley posted on Sigma releases SD1 (46Mp) at 22/09/2010 - 07:59

That's right, there's a base ISO setting and lower settings are applied via electronic compensation. I think I'm right in saying the base ISO for our current cameras is 200.

Comment by johnriley posted on K5, was it worth the wait? at 21/09/2010 - 21:48

The Sigma cameras I see as a "dead end" of development, pretty much like the Fuji DSLRs. Yes, they have their following, but it's a very, very small market and the availability of cameras and lenses for the Sigma is very poor.

I saw the images too, but also saw equally good images from all the other makes on offer.

Comment by johnriley posted on Sigma SD15? at 21/09/2010 - 21:45

I would say so, after all it's pretty usual for people to use independent lenses on their Pentax cameras. It's not a problem. Common sense and the right spirit of things is all we need, the more we try to make a rule book the more bogged down in detail we become.

Just look at government legislation to see how that works...

Comment by johnriley posted on Non Pentax gallery shots at 21/09/2010 - 21:16

Because this is a specifically aimed Pentax User site images should be shot using Pentax equipment. A Pentax lens on something else would have to be allowed in, but the principle should be clear enough.

The spirit of the rules is what is important as we are a Pentax community here. EPZ has all the scope anyone using another marque could wish for.

Where non-Pentax images are used they may well be removed if they come to our attention.

Comment by johnriley posted on Non Pentax gallery shots at 21/09/2010 - 20:40

One interesting thing I picked up from the specs is that it looks like there is a switchable choice in the style of AF. We will choose between maximum accuracy, which is probably what we have now, and maximum speed, where presumably the camera won't mess about being too fussy.

The speed option may well appeal to some, especially if the DOF is more than enough to ensure a sharply focused image.

Comment by johnriley posted on K5, was it worth the wait? at 21/09/2010 - 20:36

Quote:
If it does happen, who would upgrade and what's your thoughts on what your current pride and joy lens(s) are going to be worth?

Do we upgrade our lenses like that? If I had an 18-55mm would I automatically upgrade it when the Mk II version came out? I'm not sure that the majority of users would, although enthusiasts might.

But value only becomes an issue when we are ready to sell. A bit like negative equity in a house being irrelevant if you don't intend to move.

Comment by johnriley posted on New sdm = dc (see patent) at 21/09/2010 - 20:31

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