The shift function of the lens is far less interesting than the tilt for me. I've no wish to invest in a camera system capable of providing tilt though I agree it's the preferred way to acheive the effect. Keystone distortion can be lossy but generally a few shots off a pano rig will provide you with far more data when combined (which is very easy these days) than a single shot but emulating tilt in software is a very tough call.
On 3 December 2013 02:41, Darren Addy <[email protected]> wrote: > 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. -- 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 [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.
