Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here.
Originally posted by BigMackCam We could bounce this back and forth all night. My comment about backing up was made to underline the fact that the OP does not need both lenses, and wouldn't necessarily gain a lot from getting the 60-250 in that respect.
Whatever you and I may think on the importance of 60mm over 70mm at the short end and focus breathing at close range, we agree that the 60-250 is a very good lens
+1
60 vs 70mm the difference is quite minor. There not that many case where 60mm is perfect and 70mm very bad. It make much more sense to complement a 70-200 with a 17-50 or 16-85 than a 60-250...
As focus breathing this is significant because you typically need the most reach for birds where you need to be close anyway to still have some acceptable shot. In that respect the 60-250 isn't that conveniant.
I don't think it is worth to have both the tamron and the Pentax. I'd be more to decide for one between f/2.8 and a bit bigger lens and f/4 and a bit more reach.
I'd say purely photographically the tamron offer more because of f/2.8 that make it much more interresting for portraiture and is quite conveniant is many low light situation too. For reach and range, they are more similar than different. The main drawback of the f/2.8 is weight/size. Not this is not an important point, but one should know where his priorities are.
For me, this is size/weight. 55-300 is f/4.5 until 190mm. It is much smaller/ligher and you can manage more than a few great shots with it. I might have considered better if I was an heavy user (but certainly thinking to own both 70-200 and 60-250) but as this the 55-300 offer a lot.
In that regard, tamron 70-200 really offer something more: sharpness AND apperture. 60-250 is only offering sharpness. In difficult conditions, f/2.8 will make the difference. In easy conditions, a 55-300 does the job
DA55-300
DA55-300
DA55-300