Toronto Ontario

[eosguy]

http://www.dcresource.com/reviews/canon/eos_10d-review/index.shtml

go to the above link and scroll down and have a look see at 10D auto focus vs. manual focus-very interesting results...

Greg

 

[leeke]

Jeff

You made a number of interesting points. First, you seem to have proven without a doubt that your 10D focuses. Second, the issue of some 10D's maybe faulty - I think that may be true although I suspect not as many as there were complaints. Then the references to all digital shots needing sharpening. The seems to be true but I don't know why. Finally, I do know why p&s digitals have such large depth of field compared to film or even the 10D - it is because they are closer to the perfect infinitely small sensor point. With an infinitely small film/sensor the depth of field will be infinite.

Nice selection of lens. I am considering three Sigma lenses - a super wide zoom - probably 15-30, a 24-70 f2.8 and a 70-200 f 2.8. Any thoughts?

Kevin

 

[fotografz]

Kevin, I think you meant Marc in your above post.

All digital images need some sharpening because the camera doesn't know how big you may be making the final image. If it did, they could put an automatic sharpening program in the camera. Actually in many DSLRs you can set the level of sharpening, but I never use them because of the reason I just mentioned. I prefer to use the more powerful and controllable unsharp mask function in PhotoShop. Sharpening is the last function in the process AFTER you have set the final size to be printed.

The deep DOF issue with P&Ss is due to the size of the sensor in relation to the size (or circle of coverage) of the lens. W/A lenses have more DOF, and the lenses on the smaller P&S digital cameras are very wide zooms. They are also rarely very fast apertures, which also adds to the DOF.

 

[iammercury]

> kevin: i think the 70-200 f2.8 is a good idea for the telephoto, and for your close up lens, i would personally try to get the shortest focal length possible (15-30) because remember, due to the fact that the CMOS sensor is smaller than with a 35 mm camera, the 10D has a 1.6 x conversion factor, which would mean that the 15-30 would instead be more like 22-45, which would be good for close-ups