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Forum: Pentax SLR Lens Discussion 10-24-2018, 03:13 AM  
Good quality telezoom on a budget
Posted By jgnfld
Replies: 42
Views: 3,585
On the speed issue, I have been migrating a bit towards slower lenses since I got my K70 to replace a K50. The new camera has taught me that I can go (into what to me have previously seemed) much higher ISOs with 3 or even low 4 digit values with little or no IQ loss. I live in Newfoundland which commonly has dark shooting conditions given fog, rain, low sun angle in winter, etc. but like you concentrate on landscape and wildlife as one might expect given the environment here. The environment also pretty much requires WR lenses. I would MUCH rather pack a lighter lens for a hike back somewhere than a heavier one.

This, for example, was taken from a moving sailboat with a 55-300 PLM WR on a K70 at:
Focal Length 260.0mm
Exposure Time 1/3200s (0.0003)
Aperture F/7.1
ISO Equivalent 320


(The IQ at full res is much better than the down sampled version here.)

So I guess I might ask why exactly do you want f2.8 when you have a K3 with its sensor which is nearly as good as a K70s sensor at low light? Is the weight and hassle of the faster lens really what you need? While I have lots [ too many??? :lol: ] lenses including a number f2.8 or faster, I have found myself gravitating to the 16-85/55-300 PLM pair as my most used lenses when going outdoor when I have no particular, specialized subject in mind. Neither is particularly fast, but that really isn't an issue give their overall performance with a good sensor. And if I do want to stop action, both are quite capable (when paired with a good sensor which your K3 has).

Sorry to add a complication.
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