scalesusa wrote:
Once again, the left side was blurred on all the Rokinon / Samyang images. However, the Canon 15mm images were sharper in the center, and the extreme edges were quite good as well. The overall resulting image was much better than the Rokinon / Samyang. The 15mm FOV was noticibly larger than the 14mm Rokinon / Samyang as well.
Overall, I was very disappointed. The canon 15mm fisheye that I bought used for $300 was clearly a better lens, and exposures were set accurately. It also worked with my 1D MK III.
The Rokinon / Samyang is going back obviously, I'm not going to trade it, even if the left side was fixed, the problem on the 1D MK III rules out my use of it. ...Show more →
yeah but the fiush-eye well looks like a fish-eye and that is a pretty weird effect to use more than every now and then
Canon cameras all display f0, no matter what stop you set the samyang lens at. with the Samyang 14mm lens, I place my camera in Av, focus, then stop the lens down, and press the shutter button to meter the light at f4 and open the shutter. It does meter about 1/3-1/2 stop too brightly, but not 4 stops over.
I was having a problem with my 1D MK II overexposing, however, a full camera reset fixed that.
kodakeos wrote:
RE: metering issues.
I have started using a few alt lenses, and heres the problem with AV.
you can NOT match the F# used, with the F# on the camera.
The camera is assuming (and rightly so) that the light falling on the sensor during mirror down metering is, at full aperture.
SO if you have an F1.0 lens, and open it up to f1.0 and set the camera to F1.0. it will adjust the shutter speed correctly.
HOWEVER, if you set the lens at F4.0, and set the camera, at F4.0, the camera is going to see the amount of light @ f4.0 and meter for that, THEN subtract, 4 stops.
this will be a devastating over exposure.
If you want do that that either a: leave it at F1.0 and set the lens at f4 and ignore the "falacy" or b: set the lens at f1, meter @ f1.0, then using manual or AE lock, hold it at that setting, then change it to F4, and stop down the lens to F4. ...Show more →
Wrongo... Using stop-down metering when using 'dumb' mounted lenses is the way to go and usually requires very little EC.
scalesusa wrote:
Canon cameras all display f0, no matter what stop you set the samyang lens at. with the Samyang 14mm lens, I place my camera in Av, focus, then stop the lens down, and press the shutter button to meter the light at f4 and open the shutter. It does meter about 1/3-1/2 stop too brightly, but not 4 stops over.
I was having a problem with my 1D MK II overexposing, however, a full camera reset fixed that.
Exactly!
G. Thomas wrote:
Matt-
I kind of like that brick wall shot, actually. Pretty groovy and far out, man!
If enough people who own one show images instead of refering to images from the manufacturers specially prepared lens, I might order a replacement for the one I returned. It was awful, not really usable the left side was out of focus, and the entire image was off center, or else the right side was missing. Not worth $40 to me.
