Originally posted by guillermovilas Why did you sell you're Sigma 100-300/4
just because of the weight
So that's just my point , if i decide not to go for this lens it will be only because of it's size and weight and then i could choose between both Pentax , 300/4 & 60-250/4.
Knowing what it's mainly for ( motorbikers on circuit ) why would the 300/4 be better then the versatile 60-250/4
The 300/4 : 1.07kg and 184mm long
The 60-250/4 : 1.230kg and 167mm long
Tests say the 60-250/4 is excellent and as good if not better then prime lenses at all focals , sharp wide open .
What makes me doubt is no one has this lens , it doesn't sell and you hardly read anything on any forums about it's great performance.
On the other end there are plenty of 300/4 owners and plenty of great comments everywhere , for many this is the ultimate Pentax long range tele
You may find it strange but the main reason I did sell it (the Sigma) WAS because of the size and weight. I do walk, climb, and trek in some tricky trails and off-trail areas; on slippery rocks and deep woods .... the smaller lens is great. Oh! I had forgotten: the DA*300/4 is weather sealed.
I have no clue about the 60-250 (I never owned it nor tried it) but when it came out I almost became tempted to get that. Then I realized that I was losing 50mm reach; maybe not a big deal for some, but to me, yes.
Don't forget: a quality tele zoom lens, either the Pentax DA*60-230 or the Sigma 100-300/4, is very versatile in the sense that you might sometimes want get closer to the subject while a prime 300mm might not allow you to.
Best of luck in deciding what you'd like!
JP