John Sheehy wrote in post #18397767
You seem more intent on picking at my criticism of Canon's implementation, than coming up with solutions:
- Use a higher shutter speed with HSS. Much lower guide number, as much flash hits the shutter curtains.
- Use HTP, so if the flash part of the exposure gets too high, there is room for it. HTP works wonders for leaving headroom without darkening the default conversion or review images. There should be more than one stop available at higher ISOs. If the camera used lower analog gains for higher ISOs, too much flash could shift the balance more towards flash without actual RAW clipping. Cameras are far too JPEG-oriented.
- Use negative EC for the ambient exposure, which I consider normal procedure when flash is going to add more light, unless I am going for carefully calculated ETTR at base ISO! High ambient exposure leaves less room for flash before clipping. Negative EC drives the auto-ISO a little bit lower.
- Use a TC instead of cropping. A TC lessens the chance of flash over-exposure.
Your interpretation of my actions, no clue as to my motivations in conducting the test but unfounded speculation.
I had previously posted about the rationale of chooing ISO 400 based upon inability to regulate flash power. My test was MANUAL selection of ISO (after Auto ISO had suggested 12800 for 1/50 f/5.6) to follow up on Bassat's earlier comment, "You are aware that you can set ISO to anything you want, right?" I wanted to see what doing exactly what he proposed would accomplish, practically speaking. Ergo my test, the results of which found that even at 35'-40' distance and f/5.6 the flash seriously overexposed the shot unless dropping ISO manually from 12800 to 3200. IOW, even the 'set ISO manually' was not a workaround to the auto ISO original suggestion of 12800!
Just that the arbitary ISO400 in auto iso mode without any fluidity of that setting is a problem.
My conclusion from my test:
The nanny state was not the restriction, the inability of the equipment to cope is the restriction. If the equipment could support the use as described by Bassat, but the artificial limitations imposed by Canon design prevented them from happening (without manual intervention) I can subscribe to 'nanny state arbitrary ISO400' limitations line of thinking, but the equipment simply cannot do it well enough (yet)