All Forum Comments
Comment by johnriley posted on Competition Rules at 16/07/2009 - 22:12
For the number of units sold, Pentax are not really out of step with any of the other marques.
The thing to do is get the replacement and then enjoy it.
Comment by johnriley posted on K20D versus Nikon D300 at 16/07/2009 - 18:13
My feeling is that I like the background very much and an image with the cottage and its surroundings would be very atmospheric.
I'm less keen on the foreground as it is largely in shadow, and forms a complete second subject in itself. An image usually works best if there is only one subject.
Comment by johnriley posted on Cottage from standshag at 16/07/2009 - 16:51
Don't give away your material for nothing.
Comment by johnriley posted on Competition Rules at 16/07/2009 - 16:45
Comment by johnriley posted on K-7 Returned with faulty sensor at 16/07/2009 - 16:39
There's nothing at all showing up as a green stripe on my monitor though - where is it? Is my monitor too dark to see it?
Comment by johnriley posted on K-7 Returned with faulty sensor at 16/07/2009 - 16:28
I think there are two ways to approach this, the everyday practical way and the scientific theoretical way.
I would suggest the latter is outside the scope of this forum for most readers, so I'd refer you to a text on optics and the one I have in front of me now is Fundamentals of Optics by Jenkins & White (McGraw Hill). The laws of optics have not changed, so the age of a book, within reason, doesn't matter so much. It is very heavy going though.
In a practical sense there are quite a few excellent books on Photographic lenses (not quite the same thing) and I have two that I quite like for general knowledge:
The Lens Book by Roger Hicks & Francis Schultz (ISBN 0 7153 0149 7)
and The Complete Book of Photographic Lenses by Joseph Meehan (ISBN 0-8174-3697-9)
Both of these are very palatable and give the information needed in an accessible way.
Wikpedia does have some good articles, although not all the information is correct, but it's worth a look. For example, the article mentioned by George on teleconverters is not bad, but does say some slightly contentious things that are approximations of the truth. That may be OK depending on the reader's requirements.
In fact, as in many things, the more you know the more you find there is to know, so we all learn all the time. If I think of a better way to describe what I have been trying to put across, I'll come back to it again.
Hope that helps!
Comment by johnriley posted on The impact the sensor size has on the lens at 16/07/2009 - 16:24
What is more interesting is the difference in approach that a group of photographers, using all the marques, will have when in the same situation.
We had a recent example recently when ADAPS went to Victoria Baths in Manchester, with something like 30 photographers and four models all happily lost somewhere in the vast complex.
We all did something different and all had our own ways of seeing the subject. Any of us could have used any of the cameras, it didn't matter. What did matter was the rich subject matter.
Very inspiring and it would be quite a good Pentax User meet perhaps.
Comment by johnriley posted on K20D versus Nikon D300 at 16/07/2009 - 14:45
The Pentax and Samsung batteries are the same, just as the cameras are the same.
We have two K20D cameras and a total of 6 Pentax batteries -= I would not use an unknown source cheap battery.
There are plenty of people on here who use alternatives though, and so far no one has reported a disaster.
Comment by johnriley posted on Batteries K20D at 16/07/2009 - 10:00
I understand that people want to explain themselves, but in the end sometimes it is much better to say nothing or the bare minimum needed to place an apology, if that is what is intended.
Comment by johnriley posted on K20D versus Nikon D300 at 16/07/2009 - 09:12


If you want to read this for yourseves, I refer you to the Letters of Edward FitzGerald, which contain many such instances.