Possibly. My understanding is that lenses with back-end filter drawers have their optics designed with the expectation that another piece of glass will be in the path of the photons streaming toward their final destination. Having no filter there is possibly degrading your images.
On the other hand, I don't believe that more typical lenses with front-mounted filters are necessarily designed with the same assumption. So I wouldn't draw the conclusion that filters are universally a good thing. I've always assumed that the design compensation for a rear filter was a trade-off. Such lenses tend to require huge (expensive) filters. So, rather than make you bear the cost of expensive add-ons, they assume a (rear) filter will be in place and compensate for it. And probably design a set of the "necessary" high-quality filters that fit the drawer and conform to their design. Maybe I am giving the lens designers too much credit . . . stan On Nov 4, 2013, at 6:07 PM, Rob Studdert wrote: > My A*300/2.8 has a filter drawer but has never had a filter in there, > will my images magically improve if I put one in? :) > > > On 4 November 2013 11:29, <kwal...@peoplepc.com> wrote: >> Interestingly, along a similar lines, my 600 (and other Pentax lenses with >> drop in filters) requires a filter in place for optimum performance although >> I've never tested to see effects without a filter. >> >> Kenneth Waller >> http://www.pentaxphotogallery.com/kennethwaller >> >> ----- Original Message ----- From: "Larry Colen" <l...@red4est.com> >> Subject: Re: Filters? >> >> >> >>> Yup he lists exactly the situation I said you would see effects in. Other >>> than that has any one actually done any side by side testing to see if they >>> see any differences? Or is it just more fun to argue without being hampered >>> by facts? >>> >>> And I mean test with one filter, not ten stacked up. >>> >>> Mark Roberts <postmas...@robertstech.com> wrote: >>>> >>>> Here's the article I was referring to earlier: >>>> >>>> http://www.luminous-landscape.com/columns/sm-feb-05.shtml >> >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Rob Studdert (Digital Image Studio) > Tel: +61-418-166-870 UTC +10 Hours > Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
