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 1 
 on: September 16, 2014, 09:07:58 AM 
Started by Fotobuff - Last post by klindup
Glad to have been able to help.  Good shooting.
Ken

 2 
 on: September 16, 2014, 08:29:38 AM 
Started by Fotobuff - Last post by Fotobuff
Thank you very much. With the guidelines provided by you, I have been able to solve the problem and now I am able to get Live View images at each of the settings, P, Av, Tv and M. Its just that, if the values for shutter speed, aperture, ISO are such that it will not be possible to take a picture under the available lighting conditions, then the live view image will not be displayed. Tweaking the individual settings to make it possible to get an image under the prevailing lighting will bring back the Live View image, somewhat dark at first, which improves with further changes in the settings.

My experience in this matter has been the same as yours. I don't think Canon has mentioned it anywhere in their EOS 600D manual.

Thanks again for the help which saved me a trip to the Canon Service Centre.

 3 
 on: September 15, 2014, 02:31:23 AM 
Started by Fotobuff - Last post by klindup
I have just experimented with using live view in P, TV, AV and M modes.  It works in all four modes but! I was using the camera indoors and with the lens set to f8 there was not enough light to generate an image.  Opening  the lens to 4.5 revealed a dark image.  Pointing the lens out of a window gave normal live view images at all four settings. Changing the shutter speed from 250th to a 30th  in TV and M modes gave a normal image (the same as with P and AV modes) gave a normal  image.
So nothing wrong with the camera. It seems that live view shows the image you would get if you took the shot using the exposure settings used.  With P the camera will get the exposure correct.  With AV it can select a shutter speed that is slow enough to give a correctly exposed image.  With TV you are limited by the maximum aperture of the lens.  With manual it depends on the exposure you select.  Try using TV with say ISO 200 and 250th indoors and you will not see anything in live view.  Then extend the shutter speed and you will see that an image albeit dark starts to appear until you get an normal image in live view.
Hope this helps
Ken

 4 
 on: September 15, 2014, 02:02:55 AM 
Started by Fotobuff - Last post by Fotobuff
The Live View function does not get activated under all the options in the creative area. For example, it works in the P mode but not in Tv. Again it works in the Av mode but not in M mode. In the modes where the live view image is not visible, the LCD screen is grey with a white rectangle in the middle with some shooting information such as shutter speed, aperture ISO etc displayed. It never happened before. I can hear the mirror lifting but the image does not appear.

I am not a very experienced user and I feel that there may be a simple solution to this problem. Any solutions ?  Huh

 5 
 on: September 14, 2014, 05:01:59 PM 
Started by Frank Kolwicz - Last post by Frank Kolwicz
Much ado since the last message.

While dicking around on the web looking for info on telephoto technique (I am a pessimist and always think this problem is my fault, first) I accidentally found a scientist who knows a thing or two about optical performance (I'm withholding his name, as he may not want to be deluged with other such problems) and he had me do some specific kinds of test images. On review of the image files he said that the lens has specific kinds of aberrations due to either a misaligned optical element or "wedging".

I joined Canon Professional Service and then sent those files, some field test shots and a new batch of images of my cross-hatch test target along with target files from a rental 500/4LIS(II) for comparison with the lens, 1.4x and camera body back to Irvine. The difference in performance between my 600 and the rental 500 was very obvious! Needless to say, but I'm saying it anyway, the comparisons were done under identical conditions.

It finally has come back fixed. It is not quite as sharp as the 500/4, but produces much more usable images than before and handling it is giving me that pain in my shoulder again - I have come to enjoy that pain instead of the stomach cramps the repair service has given me.

To all apologists for Canon service I have to ask: why did it take all of this effort to get what should have been routine in dealing with a lens repair - optical performance? Do ordinary users who don't qualify for CPS (or think to join it) always get short-shrifted on service - doesn't our money entitle us to the same quality service a CPS member gets for the same financial outlay?

Of course I'm pissed! It has cost me 2 years of lost productivity and photo opportunities, thousands of dollars in shipping costs and thousands of dollars in lost equipment costs since I broke that first 600/4LIS(I), gave up on getting it repaired and had to do it all over again with another used 600/4 with the same kind of problem.

 6 
 on: September 11, 2014, 06:14:59 PM 
Started by bmpress - Last post by dashabout
Must be that posting to this forum is good luck. Shortly after I posted my question I received a shipping notification from Adorama and the lens arrived this week. So far its very impressive and worth the wait.

 7 
 on: September 11, 2014, 01:22:29 AM 
Started by bmpress - Last post by Bob Atkins
Just looking at the Adorama website, they have the 150-600 for Canon EOS listed as "on the way to our warehouse and is expected in a few days". This contrasts with the Nikon Mount lens which is listed as "currently back-ordered by the manufacturer".

So there is hope!



 8 
 on: September 09, 2014, 09:48:34 AM 
Started by peter45 - Last post by Bob Atkins
It's OK to start a new thread!

You probably wouldn't notice much difference in sharpness just displaying the images on a typical monitor and viewing at a normal distance. However the EF17-55 is f2.8 across the whole focal length range, with the 16-300 the maximum aperture varies from f3.5 at 16mm to f5 at 55mm, so it's 2/3 to 1 2/3 stops slower, so there's that to consider. The Tamron 70-300 VC is a very good lens and covers full frame should you ever go that route.

However purely in terms of convenience, the Tamron 16-300 is obviously the winner



 9 
 on: September 08, 2014, 05:48:31 PM 
Started by peter45 - Last post by peter45
"If what you want is a single lens to do everything - and you're prepared to compromise slightly in terms of overall sharpness and lens speed - then the Tamron 16-300 is a good choice. It has the widest range you can get and it's certainly optically good enough for typical amateur use. It can't compete with a bag of prime lenses of course, but you wouldn't expect it to."

Sorry I'm in the wrong lens size posting but I thought it more sensible than starting a new thread about a Tamron lens. Please correct me if I'm wrong.

A comment on the overall sharpness quoted above: I don't print, but display images on my computer and a large TV screen. Would i notice much difference in sharpness between my 17-55mm lens and the Tamron 16-300mm?  I don't know whether to keep the 17-55mm and lug it around with my 70-300 and suck it up or sell them for the Tamron. I will be keeping the 60D.

Any comments?

 10 
 on: September 02, 2014, 10:39:03 AM 
Started by KeithB - Last post by Bob Atkins
Not really. B&H are constrained by Canon's MAP policy, just like all the other authorized retailers. The prices are pretty much what I reported here:

http://www.bobatkins.com/photography/canon_price_drop_2014.html

Canon do have a rebate program (mail-in) on some camera bodies (6D, 7D, 60D, 70D) or body and lens combinations for a few lenses.

You can go to Adorama - http://www.adorama.com/?kbid=12417 and type in "Canon Rebates" to see the details.


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