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Forum: Pentax DSLR Discussion
04-10-2010, 02:25 PM
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I f the green button was advising it would tell you the exposure error with your settings . The green button sets the exposure so it does more than advise. .I don't disagree in. Some ways but when the same function is in TAv mode why duplicate it. I use manual specifically to stop all autofunctions and to have perhaps different iso than my selected aoto range
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Forum: Pentax DSLR Discussion
04-10-2010, 01:13 PM
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So what's the issue here? To me it almost sounnds like why can't we have the Nikom menus on apentax? Ok, fine, people are entitled
to theiropinions, but if you want nikom function buy a nikon. I for one, like pentax a lot more.
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Forum: Pentax DSLR Discussion
04-07-2010, 07:47 AM
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How about a new function all together, and one of my favourites of all time
Mindread.exe
what we all want is for the camera to do and/or photograph what we think we want not what we set and/or see.:D:D:D
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Forum: Pentax DSLR Discussion
04-07-2010, 06:10 AM
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define clean, best DOF, maximum sharpness, minimum grain, each of thse is a difrferent function and the camera is programmed one way at present, this does not mean I agree with the way it is programmed, just that it is what it is so what you really want is an additional function or two, on the green button. the question is, how does the camera know what you want. 1/500 is not, on a 135mm lens a shutter speed that means anything. for hand holding w/o SR you need 1/200 therefore what does the camera take as the shutter speed criteria? In reality, the best "auto ISO function" you could ask for is that the camera leave shutter speed alone (assuming you set what you want) and then set ISO to match your selected shutter speed and aperture. The other possible would be to have optional program lines, use the input focal length and then sellect either landscape, normal or action lines to trade ISO and shutter speed again far from a manual mode  Quote:
I am not sure why we are comparing it with manual mode at all, it's green button and I am assigning the exposure responsibility to the camera - it's manual lens, does NOT mean manual exposure - exposure is still automatic.
Green button function, for other than manual aperture lenses does have multiple options, I think you just want one more, as described above. Also green button is not only used in manual mode, but can be used to reset the camera to the default program line in other modes, or set aperture or shutter to match the other you have selected (Hyper program mode)
Manual aperture lenses, are another story as green button is a semi automated stopped down metering mode, and nothing more
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Forum: Pentax DSLR Discussion
04-07-2010, 05:28 AM
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In order to respond fully, I will start by agreeing with Pablom and the others who maintain auto ISO defeats the purpose of manual.
However lets look further into the auto ISO function and its behavior and you will see why you don';t want it.
Auto ISO will always look for a solution by adapting ISO before changing anything else, therefore by pressing green button, if it were enabled it would raise the ISO to maximum (of the range set) and then adjust shutter speed up or down to get exposure. this means that you may as well just pick maximum SIO and shoot with it.
Additionally, in manual mode with flash, the camera is locked on maximum sync speed when focal length is not readable by the camera, therefore all flash shots with Auto ISO will be minimum power flash, with high iso.,
The net result in both flash and natural light is to shoot at the maximum ISO in the set range, therefore if you want this behavior, then just set the ISO to maximum, you don't need the auto function for that.
There is a mode called Tav where you can set shutter and aperture (assuming you really do know what you want for artistic reasons like controlled DOF and COntrolled motion blurr or freezing action) and then let the camera pick ISO, but I am not sure many people do this
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