A bit more of a problem using DSLRs … and lots of lenses.
Recently, I had been having aperture issues with a couple lenses, but not all of them. My SONY 50mm f/1.4 and the SIGMA 10-20mm f/4-5.6 DC EX were the primary couple that had, what I would term, “intermittent aperture issues”, during shooting. My other lenses were performing fine, which would logically lead you to believe your two lenses were … “bad.”
Well, after some rather unusual testing … using AUTO and MANUAL Modes, I noticed that:
1) In Manual Mode, the aperture was indicating whatever I choose, but not necessarily at that aperture when the shutter released.
2) In AUTO Mode, the aperture setting was BLANK or just two dashes (--), indicating a “no lens” condition. (Hey, the lens was on there!)
I have determined that the contact pin on my camera, when using these two lenses, was not striking the contact on the lens firmly enough to work ALL THE TIME. It was, truly, intermittent. Believe me, these kind of problems can be really “hairy” -> Now, it works … now, it doesn’t.
The worst of all this is … I am mostly a MANUAL shooter … and do not use the camera’s AUTO settings much at all. So this “missing lens” detail did not even come up under most shooting circumstances. The camera simply told the lens what to close down to and that was all she wrote. The problem is, the lens did NOT get that message.
Anyway, what it boils down to is the rather ‘advanced use’ my camera has gotten over the past two years. All of the lens change-offs are finally taking their toll. I mention this as merely a reference point for people who may eventually come to this weird crossroad. Like “Information Technology (IT) issues” they rarely repeat, but when they do … it sometimes helps to have someone, way back when, report what they had found in the reference material database.
So, if you start seeing your camera overexposing for no apparent reason … clean those eight gold lens contacts in the camera’s lens mount and physically inspect them for equal and proper length projection.
History makes us who we are ...
I started with an Argus C3 Viewfinder.
Originally Posted by SONYNUT
It was a novel system. That device on the top was a light meter ... which you based your shot on.
I then went to Minolta XG-series SLR cameras in the mid-seventies.
Unfortunately, the XG-A was so limited in its control, I sold it and its lenses as soon as I could. This camera was a "Jekostas" dream-come-true. The first P&S SLR!
I then bought one of the first Maxxum 7000s in 1985 ... bought into the Maxxum 9000 System four times over in 1987 ... it was manual shooter's dream set.
I hugged that puppy until 2005 ... when I became unhinged and bought into Canon's unstabilized model DSLR ... and when Minolta swallowed the poison pill. :eek: I quickly grew tired of handshake in my "slower" digital shots and in 2006, I returned back to Minolta -> in the SONY version ... where my limited set of lenses were of some value, again, along with Super SteadyShot (SSS) & the α100. I have since kept it real ... with the release of the α700.
If the "Scene Selections" on the α900 are available, they have to be menu ... not the mode knob, right?
Originally Posted by SONYNUT
SONYNUT ... I have been through the α900 owner's manual a couple of times and I cannot see where the "Scene Selections" are hidden. Please, enlighten me. :) The "1", "2" & "3" on the α900's "Mode Knob" are custom presets that you design, yourself, and stick in "Memory". On the α700's "Mode Knob", it is the "MR" (Memory Recall) selection, where you use the LCD to pick from the three custom setups that you designed.