On Jan 27, 2014, at 3:24 PM, Darren Addy <[email protected]> wrote:
> To me, the point is that you make a full frame DSLR body attractive to > people who own mostly APS-C lenses. They only have to buy one > accessory (the 1.4x teleconverter) to make them useable. But the DA* lenses are superb on APS-C. Why would one want to render them less efficient? Doesn’t make much sense. I remain convinced that the Pentax pro body is the 645D. And my interaction with Pentax marketing seems to support that. Paul > > Rather than seeing FF body and lens kits, don't be surprised if you > see FF body and "full frame converter" kits. > > This is little different than people buying adapters to put different > lenses on their Sony full frame Alpha 7. > > On Mon, Jan 27, 2014 at 2:17 PM, Dario Bonazza > <[email protected]> wrote: >> Interesting (?) question: in case the 1.4x TC will allow DA lenses to cover >> FA sensor format, one could think it's a great way to make all DA lenses >> work with their intended FOV on a FA body. E.g. a 14mm used alone on a DA >> body will become a 20mm by using it via the 1.4x TC on a FA body, thus >> resulting in more or less the same FOV on different format cameras. >> >> Great, but what's the point of spreading the same amount of light gathered >> by the same front lens on a larger sensor having say the same pixel count >> (e.g. 24 MP) while losing one stop for exposure? >> >> >> Dario >> >> >> -----Messaggio originale----- From: Dario Bonazza >> Sent: Monday, January 27, 2014 9:08 PM >> >> To: Pentax-Discuss Mail List >> Subject: Re: Pentax 1.4x converter >> >> In other words, a 14mm x 1.4x becomes a true 19.6mm lens - hence >> irrespectively of sensor size - and not an "equivalent to XY mm" on a given >> format. >> The question to be answered is whether such a combo of lens and TC will give >> an image circle covering 24x36mm format or not. >> Dario >> >> -----Messaggio originale----- From: Dario Bonazza >> Sent: Monday, January 27, 2014 9:04 PM >> To: Pentax-Discuss Mail List >> Subject: Re: Pentax 1.4x converter >> >> No, the 14mm x 1.4x will become a 19.6mm f/4 in itself, whichever camera (if >> any) you put behind it. >> In case the resulting image will be large enough to cover the 24x36mm format >> (not yet confirmed), it will project a FOV corresponding to a 19.6mm f/4 >> lens. >> Dario >> >> -----Messaggio originale----- From: Alastair Robertson >> Sent: Monday, January 27, 2014 8:54 PM >> To: Pentax-Discuss Mail List >> Subject: Re: Pentax 1.4x converter >> >> wouldn't the lack of a 1.54 crop factor that APC-S sensor cameras have >> over 35mm frame more-or-less cancel out the 1.4x converter effect so >> that a DA14mm + 1.4TC on a 35mm frame would end up being a 14/1.54 x >> 1.4 = 12.7mm FOV on full frame? >> >> Alastair >> >> On 28 January 2014 08:42, Darren Addy <[email protected]> wrote: >>> >>> On Sun, Jan 26, 2014 at 10:07 AM, Mark Roberts >>> <[email protected]> wrote: >>>> >>>> (which he says Pentax is calling a "Full Frame Converter") >>> >>> >>> WUTT >>> >>> If this is true, is it possible that the converter will allow DA >>> lenses (that don't quite cover full frame) to cover them adequately >>> (albeit at 1.4x the focal length). This would be most beneficial to >>> the faster DA lenses that don't cover full frame: >>> DA 14mm f/2.8 (21mm equiv. FOV on APS-C) would become a 21mm f/4 on full >>> frame. >>> DA* 16-50mm f2.8 (with 24-75mm equiv. FOV) would become a 24-70mm f/4 >>> on full frame >>> DA* 50-135mm f2.8 (with 75-197mm equiv FOV) would become a 70-190mm f4 >>> on full frame >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> 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 >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> >> ----- >> Nessun virus nel messaggio. >> Controllato da AVG - www.avg.com >> Versione: 2013.0.3462 / Database dei virus: 3681/7037 - Data di rilascio: >> 27/01/2014 >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> >> ----- >> Nessun virus nel messaggio. >> Controllato da AVG - www.avg.com >> Versione: 2013.0.3462 / Database dei virus: 3681/7037 - Data di rilascio: >> 27/01/2014 >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> >> ----- >> Nessun virus nel messaggio. >> Controllato da AVG - www.avg.com >> Versione: 2013.0.3462 / Database dei virus: 3681/7037 - Data di rilascio: >> 27/01/2014 >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Photographers must learn not to be ashamed to have their photographs > look like photographs. > ~ Alfred Stieglitz > > -- > PDML Pentax-Discuss Mail List > [email protected] > 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 [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
