Dirty dishes

But in this photo, here i stopped down the same Pentax 67 SMC 135mm f4 Macro lens to aperture ƒ16

I did notice a very tiny amount of chromatic aberration (red-blue) visible in the fork (in the original image) - but it was much less than what other Pentax 6x7 can show. The sharpness was excellent in the sharp regions. Albeit... even at ƒ16 the depth of sharpness is not really deep... (it surprises me every time)

That's so typical for Medium Format Photography : The shallow depth of sharpness.


Color clarity

Another thing I have noticed with Pentax 6x7 lenses is, that the clarity in colors is high. It seems like they are designed to "let though" a lot of colors. Some cheaper or earlier off-brand camera lenses could sometimes give a dull(er) representation of the color scale. However, with these Pentax 6x7 lenses, that certainly is not the case - which comes to the fore on a digital sensor with refreshing clarity.

So, while these camera lenses are not on the same level of micro sharpness like modern designed, digital lenses - but they do have beautiful color clarity, and sharpness is good enough. As i so often mention, with careful post-processing with Topaz Sharpen AI - my god, you get more than plenty of the finest micro details.

On top of that - the Vertex method, emulates a true 65x65mm digital sensor, with 150 Megapixels. I get in other words fare more than i ever would bargain for *LOL* As soon I make such 450-500 MB images smaller... well, they all are super sharp looking, even without using Topaz DeNoise AI.


I am still so... fascinated: No crop factor !!

It's pretty cool, to see Pentax 6x7 lenses perform as if I would have used them on film negative alt. color negative material. That there is no difference because in both ways (analog vs digital) the full image circle of the lenses are utilized.

There is NO crop factor what so ever !

Well, in truth, the digital version (65x65 mm) shows actually even more than the native 6x7 film negative format does.

So yes - i am endlessly fascinated actually being able to work with way. I still can't grasp, that this is even possible like that.. I am literally working with a digital "6x7" medium format camera now. Or should i call it 7x7 ?! But nobody is familiar with that term (except when using Polaroid backs on a Mamiya RZ67 camera, those used to show a 7x7 format, back in the days when Polaroid still was a thing).

It's either 645, 6x6, 6x7, 6x8 or 6x9 in medium format.

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