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Mayer-Optick

DSC00738well I thought I would take another of the old M42 lenses out for a play today.  This time it is a Mayer-Optick 2.8/50 that has been lying around on the front of an old Practica nova 1B that a friend gave me a number of years ago.  It was a nice clean lens so I did not have to take it apart to clean theDSC00737 elements, I am not sure I would manage with this one either.  The only thing I had to do was disable the auto aperture thus turning it into a manual aperture lens.  This was achieved with the usual off-cut from a cotton bud and a lot of fiddling with a pair of tweezers.

Well I nipped out into the garden and took a couple pictures, I have posted two below for your delectation, its not the sharpest of lenses, but I really like the colour that this lens captures.  It is a 50mm lens therefore on the a6000 it is the equivalent of a 75mm, so I am looking forward to a portrait or two with this to see how much it warms skin tones up.  The photos below where taken with in one case the aperture fully open at f2.8, and in the other fully stopped down at f22. Perhaps a walk around the town with this is called for.

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Dyrham

DSC00723We had a day out at Dyrham park the other day, so just to wet your appetite until I get some photos on Facebook in the coming months, here are two shots in way of a Photo of the week.DSC00683 [As always click for a bigger pic].  In editing news – I still have a few hundred shots from the HS20 to wade through before I get to those from the a6000, oh well at least I enjoy it.  Wonder if we will have nice enough weather to get out and about this weekend?

Helios 44M-4

DSC00595Well I thought I would get one of my old M42 lenses out and give it a bit of a try.  It is a Helios 44M-4  2/58 which has sat on the front of my trusty old Zenit 11 since about 1985.

It was a bit dusty so I disassembled it, and
gave the lenses a good clean, and disabled the auto apertureDSC00594 so I could set it manually.   This was not as scary as it sounds, though in the heat we have had recently I did sweat a little.

So once the 44M had had a good overhaul, I strapped the adapter on to the a6000 and headed outside to take a few snaps.

DSC00585 DSC00587-EditDSC00584-EditSo here they are in lieu of this weeks picture of the week, I have to say I love the speed of this lens on this camera. Below is a close crop of one of the caterpillars in “Two” just to give you an idea of how nice this cheap Russian lens is. DSC00584


Sensor size

One of the main reasons I bought a new camera was to move to a larger sensor size.  The ability to gain better depth of field, less noise at higher ISOs and sharper less noisy prints at larger sizes were all contributing factors.

So how does a larger intermediate DSLR sensor compare to a sensor found in  a point and shoot, or bridge camera.  I will take my new a6000 and compare it with my old HS20exr.

The Sony Alpha 6000 has a 24 megapixel, 23.5×15.6mm Exmor APS HD CMOS sensor.  A diagonal of 28.21mm, a surface area of 366.60mm², and a pixel density of 6.65MP/cm².

The Fuji HS20exr has a 16 megapixel 6.4×4.8mm EXR CMOS sensor.  A diagonal of 8mm, a surface area of 30.7mm², and a pixel density of 51.93MP/cm².

So what do the actual sizes look like?

Print

Looking at the specifications its easy to see that the a6000 is going to be getting a whole lot more light per pixel, the pixel size is greater and they are less densely packed.  That is going to mean a better image with less noise, and the ability to crop down much more without loosing definition, so I should not miss the ‘superzoom’ that much.

Lets have some crop comparisons at different ISOs.  In all cases the shot was at roughly 50mm full frame equivalent, and at f5.6.  The a6000 shots are on the left and the HS20 on the right, jpegs straight from the cameras.

ISO100100

ISO400400

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It is easy to see just how much better the a6000 is as you loose light, the HS20 gets very grainy.  So am I pleased – oh yes.