Tuesday, April 14, 2026

20250413 Testing the reincarnated Canon FD 300mm f2.8

It can reach focus!  Autofocus works perfectly.

The testing target is M81 and M82, 180s exposure unguided, very fine subexposure.  No processing, seems like a big off centre from the vignetting pattern.  Will use PTEG with carbon fibre to print again for a stronger version.

And then switch to M13 for another test shot, 30s subexposure unguided.


M101 for 180s subexposure.


Setup the S30 along at 22:00, starting from M49, but then that part of the sky was not clear enough.  Gven up.

Turned to M84 and M86, will probably spend quite some time tonight on these.

And then M87.

And then M89, M90, M58 within the same frame:


An unexpected night, the forecast was partially covered but it is actually pretty clear.  Well worth to pull out a bigger setup.

No comments: