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Forum: Pentax SLR Lens Discussion
09-21-2015, 10:50 AM
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I owned an SMC DA 40 and it's a cool lens, but I didn't keep it for a couple of reasons. As someone else said, without a flash, I found 2.8 to be not quite fast enough indoors. Also, it's a good focal length if you have space, but with my own son in a small house it was frequently too tight. I got to play with a DA 70 for a while once and really loved it, but you'd need to be across a big room from a baby to take crawling/toddling shots with it.
I replaced my DA 40 with an FA 35/2 and find it better in every way. That extra stop makes a huge difference. I think the image quality is at least as good and they 5mm broader perspective makes it more useful for what you are describing. The 20-40 zoom looks like a nice lens to me and it's a good zoom range for what you describe, but it may or may not be fast enough depending on how well lit your house is.
You might think about faster aftermarket lenses in the 24-30 mm range as well. Pentax has a hole in it's lineup in this range and speed, I think.
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