Best Bright Prime Lenses for E-PL6

alexisgreat wrote:

Astrotripper wrote:

alexisgreat wrote:

I'll stay away from Rokinon and the mirror lenses though. Can only the Olympus lenses be autofocused?

Sigma also makes AF lenses for MFT. Those are the trio of f/2.8 primes and the new 30/1.4 that was just announced.

What about these Rokinon lenses you mentioned:

But they also make some lenses designed for mirrorless systems, for example the 10/2.8, 12/2. Their 12/2 is a very good choice for astro landscapes, provided you get a good copy.

AF with these?

No, Samyang (Rokinon/Bower is just a brand name for their lenses) only makes MF lenses.

About the tracking mount, I do have one, but it's the one that came with my telescope. Would that work fine with the 75mm lens?

Yes, with some limitations. Alt-Az mounts cause field rotation and their tracking precision may vary greatly depending on where you point them at.

I've been told I can do AP with it, but limited to 30 seconds (but that's by using the 2000mm OTA as the lens). I should be able to do a minute or more with just the 75mm lens, no?

Maybe, will depend on what you're aiming at. I was able to get 30 seconds with Oly 45mm (see here )

About the tele primes, I need something to bridge my camera lenses to my telescopes. Looks like the Oly 75-300 is my best option.

Well, Panasonic has OIS, which is probably more effective than E-PL6's 2-axis IBIS.

Good point, can the IS of the lens and the IS of the body be added together?

No.

I already have mirror lenses I want to use with my camera, they are telescope OTAs, the Nexstar 8 2000mm and ETX 90 1250mm telescopes. I assume I wont have any issues using these with the camera? The former is f/10 (f/6.3 with reducer) and the latter is f/13.8

I guess shutter shock might be an issue. I think we were already discussing this some time ago.

Yes, but I'm talking using these in long exposure times only....shortest would be 15 sec and longest about a minute. Shutter shock is only an issue between 1/40-1/400, right?

No. You may still get some unwanted effects on very bright stars. But for long exposures, it's trivial to work around. Just place some cover in front of the telescope (but don't touch it), fire a shutter, count to three and move away the cover. Problem fixed.