Pentax SMC DA XS 40mm f/2.8 accessories


alfamelba

Link Posted 04/05/2013 - 12:41
I have just bought a Pentax DA XS 40mm as a compact lens to add to my holster bag when I mainly want to use my Tamron 10-24mm, but could use having something a little longer available.

The lens cap seems rather vulnerable as it is only push fit so I am considering getting an aftermarket clip on type. These are available in the 27mm size but I am wondering if the small size may still make these rather fiddly - has anyone tried one of these caps?

Another possibility is to get a step up ring and use a more standard size such as 49mm. Do other forum members think that the filter threads are strong enough to have a step up ring permanently mounted?

The other advantage of 49mm is that a rubber lens hood could be used - I think that only solid metal or plastic hoods are available in 27mm size. Does anyone know how you can be sure that a hood will not cause vignetting?
Pentax K-x, 18-55 DAL, 18-250 DA, 50-300 DA, Tamron 10-24 Di II, Pentax DA 40 XS, DA 21 Ltd, Sigma 170-500 APO, A 50 F2.0, Vivitar PKA 2x converter, Jessops PKA extension tubes. Samsung GX-10, 18-55.
Pentax Q, Q7 + 01 + 02 + 03 + 06
Pentax ME Super, MG, K1000, Cosina CS-1 (+auto attachment).
Various PK lenses.

StephenHampshire

Link Posted 04/05/2013 - 16:20
I've got a 49mm step up ring attached to min 40mmXS and use a rubber hood and 49mm clip on cap with no problems with vignetting.
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alfamelba

Link Posted 05/05/2013 - 21:45
Hi Stephen,

Thanks for the feedback. Looks like that is probably the way to go. I just need to decide which of the several filter sizes my other lenses use I should aim to step up to!
Pentax K-x, 18-55 DAL, 18-250 DA, 50-300 DA, Tamron 10-24 Di II, Pentax DA 40 XS, DA 21 Ltd, Sigma 170-500 APO, A 50 F2.0, Vivitar PKA 2x converter, Jessops PKA extension tubes. Samsung GX-10, 18-55.
Pentax Q, Q7 + 01 + 02 + 03 + 06
Pentax ME Super, MG, K1000, Cosina CS-1 (+auto attachment).
Various PK lenses.
Last Edited by alfamelba on 05/05/2013 - 21:45
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