Correct me if I'm wrong, but doesn't perspective distortion in software comes at a price? Don't you end up with a trapezoidal image shape than then must be cropped to rectangular?
Another possible problem comes with the DOF and orientation of the image plane. With a T/S you have more control over the actual plane of focus. You can place the plane of focus on the front of the building, and use the shift to get the entire building into the frame without disturbing that. With the photoshop solution, you need to use DoF to cover the entire building (the plane of focus is NOT vertical, it will be parallel to the film plane, which is tilted). Software solutions almost require you to use hyperfocal distance on your lens. Here is a good, balanced discussion of the subject: http://www.arthurdomagala.com/blog/2013/04/perspective-correction-lens-vs-software-2/ and another that addresses the Samyang and Canon TS-E along with software correction. http://www.frontallobbings.com/2011/02/tilt-shift-vs-software-geometry.html I agree with Bruce that, for most people, software is going to be the preferred practical solution. Far fewer people are going to take the time to actually learn the principles of using a TS lens and also take the corresponding time to properly set up the shot with one. Much quicker and easier to take a bunch of images with your usual setup and spend the time later in post. On Mon, Dec 2, 2013 at 8:53 AM, Bruce Walker <[email protected]> wrote: > Not to seem surly, but there are no new film cameras, and film is > rapidly disappearing. Why would I want to spend $900 on a new lens to > use with a $50 camera and hard to get film? > > Besides, it's circular. Tilt-shift is mostly useful on film. With a > digital camera I can easily do perspective distortion in software. > > > On Mon, Dec 2, 2013 at 9:11 AM, Darren Addy <[email protected]> wrote: >> There are plenty of 24x36mm Pentax camera models. They use something >> called "film". I don't see any reason that one wouldn't want to pull >> out the film camera to make use of this lens, if one truly >> wanted/needed the perspective correction. With a FF digital highly >> likely, you'd also have the lens prior to what would surely be >> increased demand. >> >> Canon makes a TS-E series of lenses. Their 24mm model is currently >> TWICE the price of the Rokinon (after a $200 rebate). Comparison of >> the Rokinon vs the Canon: >> http://www.ronmartblog.com/2013/06/comparison-rokinon-vs-canon-24mm-tilt.html >> >> >> >> On Mon, Dec 2, 2013 at 7:00 AM, Bill <[email protected]> wrote: >>> On 02/12/2013 1:02 AM, Igor Roshchin wrote: >>>> >>>> >>>> I just came across a new lens for Pentax: >>>> Rokinon Tilt-Shift 24mm f/3.5 ED AS UMC Lens for Pentax >>>> >>>> http://www.bhphotovideo.com/c/product/1012957-REG/rokinon_tsl24m_p_tilt_shift_24mm_f_3_5_ed.html >>>> >>>> I've never used any tilt/shift lenses, but I remember people mentioning >>>> them on PDML (and read some discussions elsewhere) which made me >>>> interested in them. >>>> >>>> Well, I cannot justify the price ($999) for just playing with it, as >>>> I am not really sure I would benefit from it (for what I am using >>>> my camera). >>>> >>>> It is interesting, that Amazon (and the questionable-reputation "6ave") >>>> already have them (albeit at @1300): >>>> http://www.amazon.com/Rokinon-TSL24M-P-Shift-Pentax-Cameras/dp/B00EFS0ZMQ/ >>>> but B&H still offers only preorder. >>>> Actually, Adorama also has it in stock at $999: >>>> http://www.adorama.com/RK24TSPX.html >>>> >>>> Also, rather interesting is the phrase in the description on Adorama's >>>> website: >>>> "This lens is suitable primarily for full-frame cameras but will work >>>> just as well with an APS-C crop sensor. " >>>> I wonder what it is based on... >>>> (And that phrase can fuel the theories about the FF cameras. ;-) ) >>> >>> >>> All they are saying is that it will cover the 24x36 format, something it >>> would have to do to be of any interest to users of every other brand but >>> ours. >>> A lot of what these le4nses do can be emulated by using the composition >>> adjust feature and focus stacking. >>> >>> bill >>> >>> >>> >>> >>> -- >>> 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. >> >> >> >> -- >> I don't have a problem with idiots. >> I have a problem with the fact that they have an internet connection. >> >> -- >> 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. > > > > -- > -bmw > > -- > 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. -- I don't have a problem with idiots. I have a problem with the fact that they have an internet connection. -- 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.
