So with your film bodies you may well get superior image quality with those three over digital?

link

I note the line where it says

"an important observation is the fact that the digital image cannot cope with curved details"

This is similar to the LP vs CD argument where a digitised signal cannot represent 100% of an analogue value. At some point, we can say that film grain, however small has finite limits. It would appear that the crystal still betters the pixel.

In fact, the smaller crystal grain gives less noise while the same is not true for the smaller pixel. Are we going backwards or ignoring the basic facts?

Interesting, this photography lark.

Regards

This is like deja vu. Not long left Qatar and still working within the area.

link

link

Great place for photographs but no Pentax dealers! Bahrain is the nearest place to get good deals on Pentax kit.

Regards

I let you decide.

link

Regards

Here is a similar shot, from a K7.Probably from the same location?




This was taken just after 5 AM. Noise not an issue or it is?

Regards

It would stay at 18mm but have a field of view of a 27mm lens.
Fish eye effect would not remain.

Regards

Sounds like a case of FGF?

Fast Glass Fever.

Only cure is acquisition followed by bankruptcy.

I'm just waiting for the right price on a new 300mm f/2.8

Ouch.

Regards

Those two birds in No.1 look better fed than a few people I've just seen on the BBC World News!

Good photos as well. Enjoy the lens.

Regards

I am very pleased with the 1.7 AFTC and the 50-135mm

link

Regards

I never thought of it as funny looking?

Mine looks just fine. Bought it new in 1988. Used it less than a dozen times.

Regards

Hello Andrew.

You didn;t say what the lenses are,

1) There should be no exposure issues with any lens fitted to a DSLR. Unless the lenses are full manual. In which case you can "determine" the correct exposure.

2) Newer Sigma lenses should be no better at AF than older AF Sigma's. Some difference may occur due to lens speed as more light helps the camera AF system.

3) Although I don't have a specific 300mm length Sigma, I do use the 70-200 f/2.8 Mk1 and a 50-500mm Bigma. Both are sharp. You may have a front/back focus problem.The K20 can compensate for this, Try a few manual focus test shots for comparison against AF shots.

4)Not true. Agreed, there are some expensive lenses out there that if used properly can provide excellent images but don't fool yourself into thinking that buy what is perceived to be "better" kit will do anything for you that you can't already do.

You will get plenty of advise from other forum members here on these points.

Regards