Comments on: Mark IV Alert

By: Kunj Trivedi

Kunj Trivedi — Wed, 21 Sep 2011 03:25:25 +0000

Thank you Artie, The answer to your question, if I have understood correctly, is yes. The reason I asked you is also to let Canon technical dept know that there could be a problem with the software. it has happened often enough for me to raise this alarm. As regards P mode, while i know the camera decides, in P mode, I also change Camera’s decision by altering shutter and aperture where appropriate.. But in most cases, the camera takes the correct decision, in my photography. Regards/ Kunj

YAW. I would only let Canon know if this is a common problem. As I have never heard of it before, you simply need to send your camera in. I would advise sending a selection of CDs. However, your problem may very well be caused by your choice of using spot-metering…. If you have a zebra running how would you know where the spot meter way????? I would repeat your tests using Av or Tv or Manual mode. I recommend against the use of spot metering for nature photography but heck, you have already told me that you are gonna do it your way no matter what I say so I may be wasting my breath here. artie

By: Charles McRAe

Charles McRAe — Tue, 20 Sep 2011 23:36:13 +0000

Where did I get the idea to check on whites in the 240-245 level whereas you use 236 ? I probably read it some where and now will go with your 236 check.
If you get a chance take a look at updated website of “North with Spring” and it features small neotropical migrants from Ohio,Michigan and Ontario,Canada.One of your strengths has always been a great feel for whites, whereas it is one of my many weaknesses.

Chas. This is relatively new. I think that I published it somewhere…. IAC, both Robert O’Toole and I got to the same place at about the same time by taking slightly different paths. When I am converting a RAW file in ACR and the image has WHITE in it, I run the cursor over the WHITEs and check the RGB #s. If there are any values above 236 I move the Recovery slider to the right until all the highest values are 236 or so or below. By doing it this way I do not have to run nearly as many Linear Burns. And my WHITEs still look clean and bright and white. If anyone remembers where I posted the 236 info originally please shoot me a link 🙂 artie