Pentax 560mm lens now listed on Adorama...any takers!

Started Nov 5, 2012 | Discussions thread
temama Contributing Member • Posts: 642
Re: Overpriced product - just buy Sigma 500/4.5
1

Alex Sarbu wrote:

, the Pentax is by no means a cheap design, with its 6 elements in 5 groups (not being a telephoto means its optical design is simpler for the same or even higher quality). It also have the same number of ED elements (2) like the Sigma; I don't understand why people are thinking it should have a lower image quality.

Alex

I don't know how good Pentax is, but I know how excellent lens Sigma 500/4.5  is (11 Elements in 8 Groups, BTW):

http://www.sigmaphoto.com/shop/500mm-f45-ex-dg-apo-hsm-sigma

Sigma is the world's largest lens manufacturer, and they certainly have the know-how and resources to make a good lens when they want to make one. And they can produce it a very competitive price.

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