Microadjustment

[Paul]

L plates still on

Canon 7d vs 100mm macro EF IS USM...

didn't seem to be getting on with focussing the damn combo.... eventually worked out about microadjustment.... on AF, the combo was focussing 6-10mm short!.... took a while to correct, but now with a microadjust of +20 it now focusses at +/- 2mm at f3.2 on a subject 62cm away.... should auger well for next season..

whilst playing.... the DOF increase with each stop of aperture narrowing seems to be ~ 1mm from f3.2 - f5.0, then 2mm from f5 - f8, then 4mm to f10.

Is that what I should expect.?

I think I should try to keep the iso at 100, and the f as low as possible for flat subjects, or ~9 ish for angular shots, letting the camera choose the shutter speed. Would the in-built flash be useful to fill in the subject at ~60cm distance to target?

Does that make sense to all those who are experienced with DSLRs. I am sure anyone making the leap this way would be pleased to read any comments / advice regarding the above.

Maybe I should come to the workshop next year .... such a long way when negotiating with SWWBO

[Jack Harrison]

Paul said:

whilst playing.... the DOF increase with each stop of aperture narrowing seems to be ~ 1mm from f3.2 - f5.0, then 2mm from f5 - f8, then 4mm to f10.

Is that what I should expect.?

Look at this guide - it will explain (and confirm) your findings:
http://www.cambridgeincolour.com/tutori ... -field.htm

Jack

[GOLDENORFE]

congrats on new camera, the 100 macro is superb!

i tend to stay at iso200 for natural light shots with this lens, keeps the shutterspeed a bit higher. even 400 would be pretty much noise free so u could either.
depth of field is very narrow, especially compared to compact cameras with much smaller sensors, but i usually shoot at f6.3 - f8 for most butterfly shots which helps getting a oof background.
i usually only manual focus, cant trust auto to focus on the part i want! lol


phil

[Paul]

fantastic, thanks to both of you... will make good use of advice.. can't wait until next spring!

[GOLDENORFE]

dont wait till spring! are there any butterfly houses near you, great places to experiment

[Jack Harrison]

The home page of Cambridge in colour:
http://www.cambridgeincolour.com/
has other useful tips and tutorials. The chap seems to know his stuff but I've never met him although he can't live very far away.

Jack

[Paul]

hmmmm... there is a butterfly house in Stockton ..... Jack... I've referred to that website several times and it is really useful in explaining things - will keep looking in

(edit) Damn... it's closed in December