Wayne Spence wrote:
I just phoned my usually camera supplier and they explained that the following
for a 60D the Sigma 10mm will be a Non-Circular Fisheye at R9500
The Sigma 10mm FE is a fullframe FE - that means you get approx. 180 dgree FOV on the diagonal - and the image covers the entire sensor.
That's' fine - this will produce the highest res. stitched pano.
You will shoot 6-around plus nadir at a min.
and the 8mm is a circular fisheye at R12100.
The Sigma 8mm will create full circular image on a fullframe sensor. On the APS-C sensor of your 60D it will created a cropped circular image with some cropped off the long axis sides and a little (on the Canon) cropped from the short axis sides. It creates an image with a 180 degree HFOV on the Nikon DX size cropped sensor but a little less on the Canon APS-C sensor.
You shoot 4-around plus optional nadir and the res. of the stitched pano will be less than than attained using the 10mm FE.
Mediavets what do you recommend?
I have a Sigma 8mm f3.5 FE and Nikkor 10.5mm fullframe FE which I use on a Nikon DX (cropped sensor) body. Both bought secondhand years ago at good discounts from new prices.
Both are fine, I find I tend to use the 10.5mm FE more often, but that's because I mostly ushoot interiors with nothing moving in the scene, using a tripod and conventional dual axis pano head (NN4 or NN5).
If you were to shoot outdoor (or indoor) scenes with people and the like then the 4-around with teh Sigma 8mm vs. 6-around with the Sigma 10mm would be an advantage. Poeple also shoot with the Sigma 18mm from a m/needonopod using a ring-style pano head, some have even managed it handheld.
In your situation, given the significant price difference you quote I'd tend towards the 10mm unless there are reasons to want the 8mm.
Could you do a test shoot with each before deciding?