Nikkor

On the term "full frame look". Note, that with any focal reducer the angle of view widens, but the depth of field *doesn't change* at all. A 2.8 looks different in Super 16, MFT, APS-C and Full Frame. That's why the biggest problem with GH4 is it's relatively big DoF - relative to the resolution. The only way to overcome this problem are very fast lenses, not Speedboosters.

Let me explain further: It's true, high resolution will add shallowDoF to some extent, because the >circles of confusion are smaller (are they though? Are the pixel dimensions different from, say, those of the GH3?), but generellay, if there was an aesthetic benefit of 4k over HD in the first place, it had to do with selective sharpness, not with infinite detail. The existing UHD camcorders with small sensors prove that, the images look terrible.

Fullframe look is perfectly fine because what focal reducers do is compressing the image circle,or virtually scaling up the sensor.

Great, I thought the image circle wouldn't cover m43. They should make a 2x scaled version of it for the A7s -> medium format.

I wonder what will happen to the specific gh4 speedbooster if this turns out to work fine.

And the other day I saw 4000W solar panels for 2500€, fuck peak oil, bahahahaha

No autofocus at all. I don't know about aperture control, I guess it depends on the adapter.

http://www.bhphotovideo.com/c/product/983747-REG/metabones_mb_ef_e_bm3_canon_ef_to_e_mount_nex.html

This one states Autofocus so I'm wrong. But:

Only Canon-branded lenses introduced in or after 2006 are officially supported. Autofocus speed is very slow and inadequate for most moving subjects. Autofocus may be disabled for older Canon lenses and most third-party lenses, including most Sigma, Tamron and Tokina lenses and all Contax N lenses modified by Conurus. This Smart Adapter is also compatible with fully manual lenses which have no electrical contacts. For a list of reported compatibility with specific lenses please see the Metabones website.

 

And the same happens with the NEX speedbooster. You can use a APS-C lens on a fullframe body too, shure it works...

Looks amazing, can't wait to see some samples.

Speedbooster on A7S is a kind of medium format. Most FF lenses will vignette in this case; might be a useful effect. MF lenses should work ok.

From Sony rep in video sounds like ISO6400 is the top practical level, so extra light is still helpful.

Speedbooster doesn't work, with the nex speedbooster you still only get a aps-c sized circle (I asked someone to test this)

Viewfinder eye-pieces made of Thorium? Now that a entirely different topic. If you can point out a camera maker actually using thorium in an eyepiece now, tell me and I'll sue, and shut down the company.

As I said when it comes to lenses, it is NOT an issue unless you lick it for hours everyday, for months, or eat it. But with an eyepiece, we already do that (keep the eye piece in contact with an exposed part of our body, the eye) so that WOULD be dangerous to your cornea, conjunctiva and even retina. Not carcinogenic but mildly dangerous, especially if you don't wear eye glasses for example (the radiation would never penetrate the glass)

I am truly concerned about this, does anyone actually really make such thing?

I think they used it in lab stuff (microscopes,etc...) but I wouldn't rule out some old 70s cameras.

Now, if only we can get a fear-monger campaign going that convinces people the Iscoramas are radioactive...

Well there is no need for that because the variable diopters in some Iscoramas are radioactive. Isco Göttingen has a tradition of using contaminated glass, or even glass with thorium for their cinema projection lenses. The pre 36 iscoramas and the cinegon versions are affected, I definitly wouldn't want to use one.

Anyway, developing chemicals are dangerous too and nobody cares.

The light entering the lens is still the same so unless this system is more efficient capturing photons I can't see how this would make it any faster, my guess is that it's even slower.

So that's why you folks up there are so crazy :p

Rich, the pictures aren't working (they never have).

The radiation itself is not a problem, but I can see myself washing my hands all the time with these lenses so I prefer not having them.

I just sold my GH3 :wacko:

 

It could be placebo effect, but to the naked eye it seems like a more pleasing motion.

It's something that has been bothering me a lot with my nikons (on a steadycam it becomes very visible) and which doesn't seem to happen in raw cameras, I might be a little bit obsessive but it's something important to me.

I wish someone with tecnical knowledge could explain what exactly creates this, or if it's just in my imagination (or yours). I'll check some gh4 footage.

I've send them a suggestion for a medium format focal reducer, I have totally failed to do one on my own (it has terrible aberrations, and only 0.6x reduction), I want to use my glass digitally without spending millions on MFDB

Ah.  Didn't realize that.  Thanks!

Like this tipical shot with grass where you want to put in some contrast with a curve and the macroblocks rape your eyes.

It will look better as soon as you touch the colors ,contrast and/or sharpening , the macro blocks pop right in your face.

Also the shadows look cleaner so you can underexpose and use flat profiles.

But it still uses lenses, right?

Just wait, it will be 1999$ in less than a year.

what's the pass, I want to see it too ;)

Shure andy, but how do they compare to other medium format lenses?

How do the pentacon 6 lenses compare to other medium format lenses? For example with pentax 67 lenses.

I compared some pentax 67 lenses to some nikon lenses on a D3 and they had less resolution less contrast (I only have the latest versions) and had some strange colored cromatic aberrations.

I haven't bought any pentacon stuff because the cameras are a mess and I don't like the idea of thorium (call me stupid).

I wonder if you could glue two chinese speedbooster infront of the sensor to use some decent lenses on it.

Soon EVFs will be 14bit 4K OLEDs.

 

Then the flippy mirror will say bye byes.

But we are still a few years away from that (14bit screens...)

Anyway, today I took my German aunt to some sightseeing and she gave me her compact camera (some canon) to take pictures. Was defenitly fun but the lattitude is horrible. A compact viewcamera would be nice.

You have to press "OK" in live view, to change between exposure preview and the automode which is not the actual exposure (this later mode is the one that is on normally). You also have to check what kind of picture style you are using, if you have one with the birghtness,contrast,etc... pulled down you won't be able to check your exposure in liveview. You can even set a different white balance for the liveview which won't affect the one set on the top screen when taking jpgs.

The viewfinders will tend to dissappear once EVFs stop lagging, I also prefer viewing the actual scene rather than a cooked 8bit signal. The problem with fast lenses is obviously not so great, for slower apertures there is the dof preview button on the front (although it gets darker).

On the other hand real viewfinders are a big pleasure in medium format.