Quote:
Originally Posted by Lester
Due to this finding, I have now purchased a 85mm f1.2 lens to overcome the shortfalling of the 70-200 F2.8 lens.
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Careful with the 85L for astro. This lens is not full time manual focus. You have to push the shutter down half way to "activate" its focus ring. Doesn't make it particularly condusive to astro imaging IMO. If you don't have the shutter pressed half way, you can spin the focus ring as much as you want and nothing happens. It is by design, so not a fault.
That being said, fantastic lens. My favourite at the moment if you base it on amount of images taken with it over my other lenses.
For astro and around the same focal length, I'd go with the Tamron 90 macro lens. It does not just have to be used for macro. It's wonderfully sharp, much, much cheaper than the 85L and other macro lenses around the same focal length. But best of all, it has (IIRC) 9 aperture blades and they're curved. What this means is that even stopped down a little, it doesn't produce massive diffraction spikes like you get with other lenses.