Shutter priority test question.

[Ducky]

I have a Yashica GS. Everything seems to work including the metering.
If I take four pictures in a row of the same object in the same lighting, varying only the aperture, should the four photos look exactly the same in exposure and tone? I tried several series of four on a roll and found a noticible but acceptable diference betweet the four, from a bit light to a bit dark.😕
I shot the four between the yellow, not enough light, and the red, too much light, arrows.
I'll post when the film dries.
Thanks.

 

[Ducky]

These are three examples from the aperture priority test ranging over three f: stops.
It looks to me that the shutter did not change to match the aperature.
Any help please?

 

[tightsqueez]

Hey,

Based on the images you posted, I see no difference between the first and second but do see underexposure with the third. I am not familiar with the Yashica metering system but can tell you that your test is inconclusive. Here's why... The subject you shot has an area of dark and white near the center which may have shifted the last exposure. Also, when testing something always remember that more you do, the more it supports the outcome.

Try this. Try the same test but with a neutral gray with little light variation in order to factor out variations of light within the scene. Try this a few times at different f-stops and if at all possible do it again with a fresh battery. I think with a few tests with the neutral background will help. Cross referencing with another meter would be easiest but it sounds like you do not know what your shutter is firing at.

 

[Ducky]

Hey,


it sounds like you do not know what your shutter is firing at.

Correct, there is no shutter reading anywhere, it's stepless (if that's the term). I will try your suggestions, thanks very much.

 

[Ducky]

I beleive this may be the answer. (Stolen from the Yashica Guy's site.)

In daylight photography, set the lens opening to maximum for the sake of simplicity. This is 1.7 on the 'G' series. Now slowly press the shutter release button until you see the red over exposure lamp. Then adjust the lens opening until both the red and yellow lamps are out. At this point your camera is set for the correct exposure with the shutter set at 1/500th sec.
If you wish to cut the shutter speed in half to 1/250th second for the sake of greater depth of focus, move the indicated lens opening on the barrel to the next 100% smaller aperture setting. For example if the lamp went out at ƒ 5.6, decrease the lens opening by 100% to ƒ 8.0
Obviously you can move from one mid point to the next. To obtain an exposure of 1/125 th second, you would move the lens by two increments to ƒ11. Try this without film in the camera to get the hang of it.

My apologies to the Yashica Guy but that answers my question and I wanted to share it.