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Anybody using MFT bodies for astrophotography?

Started Oct 8, 2016 | Discussions thread
Mark9473 Veteran Member • Posts: 6,428
Re: Anybody using MFT bodies for astrophotography?

Max Iso wrote:

if i get a faster shorter model like a 90/500, wont using a 2x barlow essentially crop the center 40% or so, mostly cutting out the outer field curvature?

Yes that is correct (see my post above).

Just be aware that the 90/500 ED doublets don't have the same degree of correction for chromatic aberration than the more common 80/600 ED doublets (and a barlow won't change that).

Also, you have to choose how deep you want to jump into astrophotography. Particularly on the Moon, with an 80/600 or 90/500 you can just take a single image with the scope mounted on a heavy duty photo tripod. The shutter speed with these fast scopes will be fast enough to compensate for the Earth's rotation, so you wouldn't need a tracking mount.

If you want significantly better image scale, by using a barlow for example, you're quickly looking at a tracking mount and a lot more effort in image processing.

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Mark

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