Is the William Optics RedCat 51 worth buying?

Started 4 months ago | Questions thread
AstroDan Regular Member • Posts: 275
Re: Is the William Optics RedCat 51 worth buying?

There are a lot of excellent results out there for the RedCat. The RedCat (and most telescopes designed with a full frame image circle and matched corrector) will typically outperform a competing lens in terms of resolution/star quality. Where lenses have the advantage is that they are often faster.

I seriously considered a RedCat, but went with the Sigma 105mm instead. My Canon 100-400 overlaps quite closely with the RedCat51 and forthcoming RedCat71, and is one of the few lenses (and a zoom at that) has a flat field, and *reasonably* good stars. It isn't quite as good, but is more flexible, and the overlap left me unable to justify the purchase. The Sigma offered a new tool, so I went that route.

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