Originally posted by rptdc I am considering an HD DA 40mm f/2.8 40 (red) and DA 40mm f/2.8 (green) lens, or even the 40mm XS lens for my 'normal' lens on a K70 body. To be purchased in the next few weeks. . . .
[ sorry about the length of this " quick reply " but I kept finding more " useful " ( I hope ) info ]
not sure if you know this or not but up under " Lenses " there is info on different Pentax and 3rd party lenses
here is a link to the " in depth review " from 2012 of the DA 35/2.4, DA 40/2.8 Limited, and [ SMC ] DA 40/2.8 XS
Pentax DA 35mm F2.4 vs 40mm XS vs 40mm Limited Review - Introduction | PentaxForums.com Reviews
it appears to be the " green stripe" DA 40/2.8 Limited and won't answer your question about red/green but gives good info about that lens and the XS
"The Bottom Line
DA 35mm
f/2.4 "Unbeatable Value" 7.5
DA 40mm
f/2.8 Limited "The Complete Package" 8.1
DA 40mm f/2.8 XS "Lean and Mean" 7.8 "
Pentax DA 35mm F2.4 vs 40mm XS vs 40mm Limited Review - The Bottom Line | PentaxForums.com Reviews
I have a DA 40mm f/2.8 XS and like it a lot
here is the " in depth review " of the newer red stripe da 40mm f 2.8 limited
https://www.pentaxforums.com/reviews/hd-pentax-da-40mm-f28-limited/introduction.html?src=lrdb
" Tracing its lineage to the 1976 SMC Pentax-M 40mm F2.8, the latest version has Ricoh's HD coatings, promising excellent contrast with minima lghosting or flare. Compared to the SMC Limited variant, the HD Limited added Pentax's Super Protect coating to repel water and dust, and rounded aperture blades for smoother out-of-focus rendering.
The HD variant of the lens is available in both black and silver (pictured). "
Read more at:
https://www.pentaxforums.com/reviews/hd-pentax-da-40mm-f28-limited/introduct...#ixzz4ybJVkPik
" The biggest physical change with the HD version is its rounded aperture blades, and this has an effect on the out-of-focus areas when stopping down. In fact, the HDDA 40mm Limited has nearly ideal background blur and acceptable foreground blur at F4. Also starting at that aperture, specular highlights - points of bright light - render smoothly without any outlining. "
Read more at:
https://www.pentaxforums.com/reviews/hd-pentax-da-40mm-f28-limited/bokeh.html#ixzz4ybIzACmw ---------- Post added 11-16-17 at 07:15 ----------
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Originally posted by Na Horuk This might help:
HD vs. SMC Pentax Limited Primes Review - Introduction | PentaxForums.com Reviews
HD has newer lens coatings, which should improve IQ a little, especially contrast and flare resistance.
Some SMC DA limited lenses have special starburst, which are no longer the same on the HD DA limited versions because of the different aperture blades (smoother bokeh, but less distinct starburst diffraction spikes), but this is mostly relevant to the wide angle like 15mm and 21mm.
If you are on a budget, get DA 40mm XS. If you want the top option, get the HD (red ring) version. Or look for used lenses at Keh.com, ebay, PF marketplace for the best deal on one of the Pentax 40mm primes and get that one
I have DA 40mm XS and its optics are good, but the 27mm filter thread and lack of lens hood can be annoying sometimes. It has, as far as we know, the same optics as the SMC DA, but with rounded blades.
according to the " in depth review " linked above, the XS has:
"The nine aperture blades on this model are curved to produce a more circular opening as the lens is stopped down. This is one of the few significant differences between it and the earlier DA 40/2.8 Limited, and one whose effects we’ll examine during our bokeh test. "
Read more at:
https://www.pentaxforums.com/reviews/da-35mm-40mm-limited-xs-shootout/design...#ixzz4ybHdcBaZ
" Conclusions
Once again, we find that all three lenses perform well, and very similarly to one another. Really, the only substantive difference comes from the DA 40mm f/2.8 XS's rounded aperture blades, which give it slightly rounder bokeh highlights than the DA 40mm f/2.8 Limited when the lens is stopped down. To be honest, even that difference requires a very, very discerning eye. The DA 35mm f/2.4 definitely produces the least rounded bokeh highlights—they're distinctly hexagonal from f/4 onward.
If any lens is a winner in this category it's the DA 40 XS, but in our opinion it's pretty much a dead heat between the two 40s.
Read more at:
https://www.pentaxforums.com/reviews/da-35mm-40mm-limited-xs-shootout/image-...#ixzz4ybIC3tVF
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you can find 27mm filters
through the assistance of a forum member I was able to find a lens cap for the 40mm XS
Originally posted by suraswami this link shows the actual lens cap
lens cap or shade 40 mm xs, lens shade for 100 mm or - PentaxForums.com