no lens with ANY 2X TC is ever going to approach the performance of ANY Pentax dedicated MACRO Lens, TCs suck, all they do is magnify/project a central portion of the primary lens, even if they were perfect you are not going to get nearly as much contrast nor resolution as a primary MACRO lens of the same focal length without the 2xTC in place. The matter is even worse with APS digital than it is with FF film because you are then using an even smaller section of the lens circle and blowing that up again... jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adam Maas Sent: Wednesday, April 23, 2008 2:34 PM To: Pentax-Discuss Mail List Subject: Re: Long macro lens This is a 2x flat-field converter specifically matched to the Tamron 90mm f2.5 Macro lens. It's not going to bugger anything up, unlike a normal 2x TC. -Adam On Wed, Apr 23, 2008 at 12:00 AM, J. C. O'Connell <[EMAIL PROTECTED]> wrote: > you guys must have never used real macro lenses, not only are regular > lenses some have suggested inferior at macro mags compared to real > macros, using a 2x will bugger up the situation beyond belief, forget > that idea completely. jco > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Brian Walters > Sent: Tuesday, April 22, 2008 8:48 PM > To: Pentax-Discuss Mail List > Subject: Re: Long macro lens > > > Yes, I was about to suggest that. The 2x converter is commonly > available on ebay at well under $100. You'll lose a couple of stops > but, if you're using the lens well stopped down to maximize depth of > field, that may not matter. > > I've got this exact combination fitted to my DS - works well. > > Might be worth a try until you decide something more expensive is > needed. > > > Cheers > > Brian > > ++++++++++++++++++++++++++++++++++ > Brian Walters > Western Sydney Australia http://members.westnet.com.au/brianwal/SL/ > > > > On Tue, 22 Apr 2008 20:08:35 -0400, "Perry Pellechia" > <[EMAIL PROTECTED]> said: > If your Tamron 90 is the Adaptall > version why not get the Tamron flat > field 2x TC that was designed > for it? It make a pretty nice combo and > you should be able to find > the TC on eBay for less than $100. > > > On Tue, Apr 22, 2008 at 6:48 PM, Barry Rice <[EMAIL PROTECTED]> > > wrote: > > > > > > Hey Folks, > > > > > > My wife is becoming increasingly interested in photography of > > > flighty, skittish, and sometimes dangerous animals, such as > > > butterflies, reptiles, and snakes. I realized that the ideal lens > > > for her would be something like a 200 mm 1:1 macro. Even better > > > would be if it were autofocus. > > > > > > Is there anything like this that would fit her *istDs? Or are we in > > > a fantasy land that I couldn't afford? Currently she uses my 90mm > > > Tamron, but can't quite get close enough with that lens. > > > > > > Cheers > > > > > > Barry > > > > -- > > > -- > http://www.fastmail.fm - The way an email service should be > > > -- > 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. > -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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.
