@albertz great stuff. Do you shoot everything in natural at -5 and then simple apply an osiris lut like m31 or vision x? in speedgrade can you choose the strength in percentage of how much the lut is applied to the footage?

@saksofon Your works with the little G6 are incredible. In particular I like the cold color look, do you sue a prticular profile/grading workflow?

it very well could just be a bad adapter, but I'll just live with it for now. :) I would really love to directly compare my copy to a metabones. Would be interesting to see the difference.

Instead of so much talking, it is just better to contact and make exchange if you think it is soft in some part. Period. No "may be" or anything like it. Just before make normal test with different lenses.

@joethepro

Ok that makes senses. Anytime you put a speed booster or filter on the lens you increase the chance of degrading the image. I am really picky when it comes to image quality so when I am in the super anal mode I will remove any filters that I have on my lenses and shoot without any filters. I have a B+W filter on my 85mm prime and will take it off sometimes to get the best image quality. That is pretty anal but I do notice small little details in the image quality without the filters.

I looked at some of the images that you shot with the RJ looks good. I would not shoot landscape or the like with any of the speed boosters. I don't leave the speedbooster on the GH2/GH4 all the time, I only use it to try and achieve a shallower depth of field, wider field of view or to save a stop of light. Unfortunately there is no free lunch with the speed boosters and there is a degradation in quality with all of the speed boosters so this is why use it sparingly. I did not test BOKEH with the speed boosters but I am sure that is probably has some type of effect on that as well

The other thing to consider is maybe the lens and or speed booster is decentered. This will have the same type of effect on the image were basically one side or portion of the image will look like it is out of focus. I purchased a brand new Tamron 70-200 F/2.8 VC that had major decentering, in fact it had the worst decentering that I have seen from any lens that I have purchased to date. My Nikon 70-200 F/2.8, 85mm, and 50mm lenses are spot on with no decentering issues. Anyways just something to consider in regards to what you have mentioned because there are a lot of variables.

@Azo The smearing is not dramatic, but it is noticable if you are looking for it. Its almost like the look of a lens that is ever so slightly out of focus with very harsh bokeh. I know that especially at f/1.0, much of the image will be out of focus, but even when I focus on some details at the outer 1/2 of the frame, the issue becomes apparent.

Ill do some further tests eventually and post them here.

Does the Lens Turbo perform differently with different lenses? After doing some tests Ive realized that it seems to have wreaked havoc on my Nikon 35mm AI 1.4 wide open. I could tell even before the tests. Everything but the center 10% is worse with the lens turbo. Even stopped down, it sort of smears the outer 50% of the image. Could I just have a bad copy?

@Rylo & @kin869 Thank you

@Tscheckoff it is alright that I lose aperture control, I'll use a variND to try and compensate for that, but other than that no issues?

I'm only asking because I've heard of issues with specific lenses on specific boosters (mostly metabones I think) where serious damage can be done if not careful. Maybe that is only with the BMD specific boosters being used on GH4...I just like to be safe than sorry.

@RyLo It's not a hard and fast rule, the image circle of some APS-C lenses (in my case designed for Nikon DX 1.5x) can cover full frame sensor (Tokina 11-16mm apparently covers at 15-16mm), so it's down to specific lenses. My DX Sigma 10-20mm Nikon mount vignettes noticeably (aka more than the normal vignetting for the lens) with the RJ on the GH2 until just about 12mm (also slightly dependent on focus distance), then it covers from there on.

I haven't heard about any specific issues with those two lenses, but they are designed for APS-C sized sensors. So depending on your camera, you may have issues. GH1, GH2, and GH3 all go outside that with the RJ Lens Turbo. So you'll probably have some pretty heavy vignetting with those lenses. GH4 is barely wider than APS-C, so it's probably okay. Maybe only slight vignetting. BMCC, and BMPCC should be safe.

Here's my math. Just take crop factor (relative to Full Frame) and multiply it by 0.716 and you get the crop factor with the RJ (still relative to full frame). APS-C is 1.6x. The GH1 and GH2 actually end up with a crop factor slightly wider than Super 35, which, IMO, is awesome. However, that limits you to FF lenses.

Someone correct me if there's a flaw in my reasoning.

@virgilr Hm, Are you sure you have an "M" 50mm 1.8? I have the M 50mm 1.7 and love love love that lens. I think this is what you actually mean. Its such a great portrait lens on the 2x crop cameras. If I find any more great deals on Pentax lenses I may have to snag a lens turbo for them!

@racer5 Thanks for advice - shooting test video this weekend, so will post.

@matt_gh2 Those images were taken with the RJ Turbo PK to m43, for clicked aperture ring lenses. The lenses you bought are great, let's hear how they work out once they arrive. With the RJ they will be brighter, wider, and to my eyes slightly sharper wide on the crop sensor, so recommend adding that to the mix. Slammed at the moment, but I'll see about shooting a clip or two with the RJPK next time I'm out, if you don't beat me to it first!

Just bought Pentax 50mm f1.4 and 28mm f2.8. Thanks for inspiration @racer5. Will see how they translate to video on my GH2. Will probably order this RJ Turbo.