STF mode in Maxxum 7 recreated for DSLR's |
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6tyNine ![]() Senior Member ![]() Joined: 04 April 2007 Location: Canada Status: Offline Posts: 1580 |
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went for a stroll tonight and decided to try it out. kinda odd. i think it'll take a bit more playing around with the opacities to make the final results best suited.
one of my greatest complaints about the stf is the thick DOF. i'm learning to see how this might be preferred which gives some structure to the bokeh as opposed to typical minolta cream. ![]() |
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Sony α100, Sony 18-70mm f/3.5-5.6, Sony 75-300mm f/4.5-5.6
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parv ![]() Groupie ![]() Joined: 25 December 2007 Country: United States Location: United States Status: Offline Posts: 90 |
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6tyNine, I would have stopped at f/4 as the star pattern had started to emerge at this point. Have you tried shots at 1/3 stop interval instead of 1 stop?
I will try with Minolta 80-200mm f/2.8 HS, which lacks inherent good bokeh. Edited by parv - 09 November 2009 at 10:35 |
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6tyNine ![]() Senior Member ![]() Joined: 04 April 2007 Location: Canada Status: Offline Posts: 1580 |
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yea i was thinking about the stf range of f-stops.
that's quite strange, i always thought 80-200G had pretty good bokeh. |
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Sony α100, Sony 18-70mm f/3.5-5.6, Sony 75-300mm f/4.5-5.6
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photoman ![]() Senior Member ![]() Joined: 17 August 2009 Country: United States Location: Ohio Status: Offline Posts: 373 |
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When using a very large aperture range like 6tyNine did, it seems to create a somewhat dreamy/soft focus look to the image. I think that in order to get a good STF look, one must use a somewhat smaller aperture range. I think the third image gives the best bokeh and still has a very shallow DOF.
These were shot on the Minolta 50mm f/1.7 STF on A700 Aperture range: f/1.7 - f/20 1-stop increments 8 images ![]() Normal on A700 f/8 ![]() STF on A700 Aperture range: f/1.7 - f/3.5 1/3-stop increments 7 images ![]() Normal on A700 f/1.7 ![]() |
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parv ![]() Groupie ![]() Joined: 25 December 2007 Country: United States Location: United States Status: Offline Posts: 90 |
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Well, after a search I failed to come up with another contrary view about Minolta 80-200mm f/2.8 HS bokeh; perhaps the background was just brutal. Anybody wants to loan out 135mm STF for me to try?
I will need to find out some other place then. Any suggestions to avoid another brutality? Edited by parv - 09 November 2009 at 16:20 |
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zk-cessnaguy ![]() Senior Member ![]() Joined: 04 June 2007 Country: New Zealand Location: Auckland Status: Offline Posts: 1706 |
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Another attempt, this time using the following lenses:
Pentax Super Takumar 50/1.4; Pentax Super Takumar 85/1.9 and Pentax SMC Takumar 135/2.5 All lenses shot at wide open aperture then stopped down one click per shot until 7 images per lens were taken. 1. 50/1.4 at f1.4 ![]() Nasty bokeh! (and you can really see the yellowing colour cast...) 2. 50/1.5 STF simulation ![]() Much better... 3. 85/1.9 at f1.9 ![]() Nice bokeh open... but we already knew that. 4. 85/1.9 STF simulation ![]() Not much of an improvement, maybe a little bit smoother. 5. 135/2.5 at f2.5 ![]() Similar results to the 85/1.9. 6. 135/2.5 STF simulation ![]() The smaller apertures used in the STF sim are starting to have an effect here. |
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There is nothing, absolutely nothing, half so much worth doing, as simply messing about in boats
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Gabriel ![]() Senior Member ![]() Emeritus Member Joined: 05 December 2006 Location: France Status: Offline Posts: 1931 |
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Trial with a super-takumar (7 exposures blended):
standard: ![]() stf: ![]() It is indeed a huge improvement. Edited by Gabriel - 20 November 2009 at 12:02 |
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Joe Appleby ![]() Newbie ![]() Joined: 09 October 2008 Country: United Kingdom Location: Jena Status: Offline Posts: 30 |
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I guess I will give this a try this weekend. Maybe with the Zeiss 135 3.5 M42. Although I have to check whether the aperture still closes correctly.
A friend of mine, Nikon user, will try this probably tonight on his new 14-24 2.8. |
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6tyNine ![]() Senior Member ![]() Joined: 04 April 2007 Location: Canada Status: Offline Posts: 1580 |
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um... how? |
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Sony α100, Sony 18-70mm f/3.5-5.6, Sony 75-300mm f/4.5-5.6
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kefkafloyd ![]() Senior Member ![]() Joined: 04 July 2006 Country: United States Location: Massachusetts Status: Offline Posts: 2455 |
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I'm guessing because there's less outlining going on in the upper left.
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Gabriel ![]() Senior Member ![]() Emeritus Member Joined: 05 December 2006 Location: France Status: Offline Posts: 1931 |
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![]() Bokeh is smoother in the STF version(and we lost the hexagonal aperture shape). To my own taste, it is better. Edited by Gabriel - 20 November 2009 at 17:07 |
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tleeds ![]() Newbie ![]() Joined: 15 November 2008 Location: Canada Status: Offline Posts: 10 |
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Old topic, but I figured I'd interject.
I've used the STF and done a couple of these photoshop versions. The point everyone seems to be missing is that the STF lens great bokeh is just a side effect. The real star (and the reason the lens is so nice) is the STF part. Smooth Trans Focus <- They're referring to the transition from in-focus to out-of-focus. On most lenses, that transition is abrupt and well defined. The STF magically gets progressively sharper as you approach the focal plane and progressively blurrier as you leave it. This is why images taken with the STF seem to *jump*. Focus on the STF is a gradient instead of being a hard cutoff. Some of the photoshop renders here exhibit that awesome STF transition, but others look like regular photos with slightly better bokeh. The STF is always a strange beast to use. It works better for some shots than others. (A portrait with a far-off background is not a good use of the lens or technique)... but a portrait taken at an oblique angle with your subject close to the background is a wonderful use of the lens. |
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dekie ![]() Senior Member ![]() Joined: 17 July 2006 Country: Belgium Location: Belgium Status: Offline Posts: 394 |
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Recreated the effect in Photoshop with two layers and a layer mask on the
f1.7 version of your picture. Lens blur on the upper layer. This method is usable on handheld pictures with moving objects. ![]() Gr. |
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photoman ![]() Senior Member ![]() Joined: 17 August 2009 Country: United States Location: Ohio Status: Offline Posts: 373 |
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I just got a Minolta 85mm f1.4 and was wanting to try this technique out on this lens. Here are the results. I experimented with different f-stop ranges and with using different numbers of photos in the composite. I believe that using at least 7 images while varying the aperture at 1/3 stop increments gives the best results (this is the 7 image f1.4-2.8 case).
here is the original at f1.4 ![]() and here are comparison of the different setups I tried. Using only 3 or 4 images in the STF composite, it is pretty easy to see the overlapping image circles in the out of focus areas. Its hard to see this in the small image (darn you flickr). So here is a download for the original. Unfortunately it wont be permanently available. The image is full resolution from my a700. ![]()
Since you've got the STF lens and done several of the photoshop STF images, could you show us any examples of this?
What did you do to the masked layer? Did you apply a gaussian blur or lens blur filter in photoshop? Edited by photoman - 18 May 2011 at 22:18 |
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A700, Sig 10-20, 17-70, 24 f2.8 400 f5.6 telemacro, Min 85 f1.4, 50 f1.7, 70-210, Cosina 100 macro,
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