|
Search this group's discussions
|
OT: STF mode on Minolta Dynax / Maxxum 7 for all focal lengths
|
Hi all,
I was drawn towards recently buying a Minolta Dynax 7 film body since I came across an article that mentioned that it had a STF mode built in which could be used with all suitable lenses. As a bokeh lover, I really liked the idea of playing with STF on focal lengths other than 135mm (on the STF lens). Has anyone played around with this idea?
I think it would be great if Sony could re-introduce this as a feature into their DSLR bodies. I'm not aware of any reason why this isn't possible. Does anyone have insight into this?
Posted at 5:24PM, 8 April 2010 PDT
(permalink)
|
|
The “STF mode” works by varying the aperture during exposure. This causes the circles of confusion to “fade out” toward the edges as the centre receives light at all apertures but the edges only at large apertures (since the circles shrink as the aperture is stopped down).
Since the aperture on Sony/Minolta AF lenses is operated mechanically by the camera body, there's no reason why this couldn't be implemented on DSLRs if Sony wished to do so. Since they still sell the STF lens, they might not want to give the impression that the same effect can be obtained with any lens, and most users would probably find this feature confusing and/or hard to understand. Its use would also be limited to fast lenses used at large apertures, and the operating speed of the aperture would impose limits on the available shutter speeds.
Posted 26 months ago.
(permalink)
|
|
7 overlapping exposures, all on the same frame...
It's supposed emulate The exotic 135 f/2.8 STF lens.
Posted 26 months ago.
(permalink)
|
|
^ Add... Closing the aperture in 2/3 or a whole stop in each shot.
and as Arkku said, it could confuse users. If when implemented on the Maxxum 7, a remarkable PRO camera most didn't knew what it was about or try it one time too many... imagine what an average DSRL user may think. A clue... they would flood this forum with questions, haha.
Originally posted 26 months ago.
(permalink)
Fernando "El Krusty" Meza edited this topic 26 months ago.
|
|
|
One might try to re-create this effect on digital by setting the camera on a tripod and exposing the photo with consecutively smaller apertures, then blending those in post-processing.
I've also tried to modify a manual focus lens by placing a cardboard cut-out “apodization filter” inside the lens. It actually worked pretty well in some situations, but in bright highlights the shape of the cut-out is visible and rather distracting.
Posted 26 months ago.
(permalink)
|
|
|
Still, what a cool built in feature. I'd sure like to see some demo pics .
Posted 26 months ago.
(permalink)
|
|
That's one reason why the "7" was regarded as one of the top film SLR's of its time.
Posted 26 months ago.
(permalink)
|
Would you like to comment?
Sign up for a free account, or sign in (if you're already a member).
|
|
α - Sony Alpha DSLR Cameras /
Discuss
Feed – Subscribe to α - Sony Alpha DSLR Cameras discussion threads