canon 100-400

this is the best i could get with the amount of space i have i dont know if it will help i couldnt get to 400mm as my marine tank was behind me preventing me going any further back and if i went to full 400mm i couldnt get the ruler etc in

Its quite dull here so dont have a great deal of light

http://www.flickr.com/photos/looneytunez/5615793187/

Let me know what you think
 
Last edited:
if anyone local wants to come and test this lens out for themselves as i still think its me doing something wrong

I would like someone if possible to come and test it and let me know if its working fine or it needs recalibrating
 
Is it Sharp when using flash? Thought I had big problems with my sigma 70-200 non OS on my 7d but even at 250th sec there was still a little shake. I stuck it on a tripod with flash and photographed some flowers.. pin sharp so I never let shutter speed go below 500th sec. IS should be helping you use lower shutter speeds but don't think you always get 2 or 3 stops.
 
ive never tried it with flash as ive never been in a situation to need it will try it next weekend and see what happens

the problem im facing is not knowing which settings to use for things

like which shutter speed combined with aperture and iso im having trouble combining them all together in order to get the right picture
 
Last edited:
looneytunez1024 said:
this is the best i could get with the amount of space i have i dont know if it will help i couldnt get to 400mm as my marine tank was behind me preventing me going any further back and if i went to full 400mm i couldnt get the ruler etc in

Its quite dull here so dont have a great deal of light

http://www.flickr.com/photos/looneytunez/5615793187/

Let me know what you think
Click to expand...

Lou, you can't tell from that shot. The camera must be square to the box, and the rule right next to it, slanted so that it sits a few inches in front of the face, and same behind. Mark the spot on the ruler, or note the measurement, that is exactly in line with the front of the box.

Position the camera so that the centre focus point is just to the left of the rule, say a couple of inches, and try and get it so that it sits over that nice dark line on the box for good contrast for it to lock on to.

Shoot from as far back as you reasonably can, three meters should be fine. At lowest f/number, ie f/5.6.

Then zoom in on the LCD and you should be able to see where the focus has landed on the rule. With micro adjust, you should be able to get it within about an inch though in practise it's often hard to be that accurate yourself. But the camera should be able to do it.

At f/5.6, it won't be easy to see exactly where the point of sharpest focus is. But you should be able to estimate it reasonably accurately. If it's out and you you're tempted to apply micro adjustment, be sure to do repeated shots resetting the focus to a different distance each time to make the system work for itself, and to make sure any error is consistent. You should also test at shortest and middle focal lengths, which may be slightly different. Go for the best compromise. Finally, test it outdoors on a really distant subject to make sure everything is okay at long range. A low road/street sign is good, because you can focus accurately on that, and then look at the ground/grass around the posts fore and aft to make sure the focus is optimum where it should be.

Hope that makes sense :)
 
ill try that but thinking back all the images ive taken on my 60d not just with this lens but my macro and kit lens have come out soft im going to take it back to jessops and see what they can do for me ive rang and hes said its still within the 30 days so should be able to exchange it if it is found faulty.
 
Well jessops have exchanged the camera after testing it so must of been something wrong with it.

I never had any problems with the camera when i first got it its only since i updated the firmware so will not be doing that this time and see if it makes a difference
 
You must log in or register to reply here.
Back
Top