01-21-2013, 03:52 PM
Quote:......The contrast looks nice, though, and the sharpness too.......
......hmmm it depends.....(snip)
Edit (my time wed23rd 8am) -
actually this is quite a simple lens after all - on my copy of this lens on aps-c =
if i want lovely sharp pictures on difficult scenes / low contrast grey days this is a f/5.6-f/8 lens throughout its range (24-70) -
if i want the same sharp pictures at f/4, best to shoot from (approx) 50mm - 70mm but on easier scenes / better days f/4 is possibly useable too from 24-50mm - (Note: see the last edit below for the explanation for this with this copy of this lens at 24-50)
- diffraction sets in at (approx) f/11
- the macro is nice imo
- so, time to be doing other things.....and of course i could be wrong re. this observation (determined by shooting a difficult plant from my front balcony on a grey day - well you should see the plant in question, it's definitely fuzzy textured and hard to see - the worst conditions that more normal people might not consider shooting :-)
....... and i like to think that the green 2 on the right over there is for me saying that i'll now be moving onto other things......:-)
another Edit (thurs.24th)….
…..ok i said i would finish writing about this lens, but i chased up an obvious fix for the softness at 24mm - and yes it appears to be a front focus error, requiring a microfocus compensation of +8 for best sharpness at f/4 - but didn't i check the microfocus before? - yes i did, but only at 70mm where the lens has no front focus problem, so using autofocus this copy appears to have variable front focus, particularly between 47mm and 24mm, to become a +8 fix@24 - the extra dof covered it at the distances shot + probably added sharpness when closed down a tad i suppose -
anyhow as i don't think i can apply a variable focus fix to a canon camera i will return this lens to the shop for repair or replacement -
… sorry to have been a bother here - hope it will be perfect when it returns - i do like this lens