I would argue that it makes at least as much sense as it always has (which is to say particularly on the longer lenses). If a DA* 300mm f/4 could become a 420mm f/5.6 that is not a bad thing (and the teleconverter surely would cost less than a lens of that focal length and speed would... one would HOPE).
Don't forget that with electronics communicating which lens is on the camera, a lot of things are possible with firmware updates (like lens profiles we have now would become lens profiles when mounted on the 1.4x TC). On Mon, Jan 27, 2014 at 2:37 PM, Paul Stenquist <pnstenqu...@comcast.net> wrote: > > On Jan 27, 2014, at 3:24 PM, Darren Addy <pixelsmi...@gmail.com> 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 >> <dario.bona...@virgilio.it> 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 <pixelsmi...@gmail.com> wrote: >>>> >>>> On Sun, Jan 26, 2014 at 10:07 AM, Mark Roberts >>>> <postmas...@robertstech.com> 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 >>>> 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. >>> >>> >>> ----- >>> 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 >>> 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. >>> >>> >>> ----- >>> 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 >>> 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. >>> >>> >>> ----- >>> 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 >>> 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. >> >> >> >> -- >> Photographers must learn not to be ashamed to have their photographs >> look like photographs. >> ~ Alfred Stieglitz >> >> -- >> 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. -- Photographers must learn not to be ashamed to have their photographs look like photographs. ~ Alfred Stieglitz -- 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.
