Sp12 wrote:
No, Pentax has in-camera sensor-shift. It requires a tripod and is limited to about 3mm on newer models.
No way! That's cool. Well, maybe not so cool...
I just downloaded the K5 manual. "Composition adjustment" provides up to +/- 1.5mm shift and/or rise, at zero rotation. "Horizon correction" provides "up to" 2 deg rotational adjustment - this is not equivalent to tilt, it is rotating the sensor on an axis parallel to the direction the lens is pointed. Tilt and swing rotate the lens/camera on axes perpendicular to the direction the lens is pointing.
My conclusion is that the Pentax sensor motions don't provide a functional shift capability, and no tilt at all. It's nice that Pentax lets the user control rise and shift motions (which are there for camera shake compensation), but +/- 1.5mm is only 12.5% of the sensor height, and 8% of sensor width. IMO, this isn't of any functional benefit.
yauyi wrote:
Just curious, is it possible to implement tilt/shift sensor onto our DSLR instead of relying on T/S lens? maybe some type of micro motor/servo to control the sensor movement? it would be sweet to retain AF on the lens and still tilt/shift via the sensor.
Einstein's law of relativity. Either way you need a lens with a much larger imaging circle and it makes more sense to have the specialist lens than the try to get the sensor to move.
I just found this old thread talking about tilt/shift sensor for DSLR -- something I often think of. Correct me if I am wrong, but all I want is tilt and I would even be happy with that only in landscape orientation. With the sensor just tilting there is no need for a larger image circle. Landscape shots would then be in focus. Yes perspective would loose (lines would not be parallel) but that is easily corrected in PhotoShop. Alan
RCicala wrote:
Simple reality is the manufacturers are struggling to keep the sensor plane perfectly parallel to the lens mount now (well, not perfectly, but reasonably close). Put that sensor on a mechanical tilt-shift arrangement and imagine what it would be like.
Manual focus adjust for sensors! I should patent it, immediately!
yauyi wrote:
Just curious, is it possible to implement tilt/shift sensor onto our DSLR instead of relying on T/S lens? maybe some type of micro motor/servo to control the sensor movement? it would be sweet to retain AF on the lens and still tilt/shift via the sensor.
I can think of two good reasons.
1. Only a very small subset of photographers using DSLRs would be interested, especially since the cost would likely be considerably higher. I'm betting that there simply would not be enough market interest for the companies to justify the cost.
2. Related to the above, the mechanism of a TS sensor would be tricky. I suppose it could be motor controlled, but that creates a series of complexities. Manual control might be possible, but try to imagine the mechanism! And any solution would have to be very, very good at locking the sensor in a plane perfectly perpendicular to the average light path from the subject to the sensor.
for starters it would probably be a horror story to get it aligned perfectly for regular shooting, the tolerances are so crazy small, it's surprising they are able to build the sensor and mount plane as aligned as they are as is
I am just wanting tilt only (no shift) and I want tilt only on one axis (landscape orientation) (and actually only forward tilt). And yes there might not be a large enough market. Alan
if you would tilt the sensor(if it were possible), the majority of the image would be out of focus and I would suspect have color problems also because of the different wavelengths of light not hitting the sensor correctly. You need to have the tilt/shift mechanism between the subject and the recording device.
