Hi everybody! I wonder about the history of two lenses: Tokina ATX 80-400 f/4-5.6 and Sigma 100-300 f/4
1. Tokina: THK web site says it is not available in Pentax mount, but as far as I understand, the previous variation of this lens was available (AF Pentax mount). I couldn't, however, find any references to its quality. Overall, - does anybody know what was the history of this lens: when did it come on the market, when was it replaced by the present model, and why Tokina no longer makes it with Pentax mount? 2. Sigma 100-300 f/4: I am still looking for it, and so, I wonder - what was the history of this lens: when was it introduced to the market? Why so few store carry it - in any mount, but especially in Pentax? Thank you, Igor
