Author Archives: lookerens

From what ISO point old and new cameras start “to make noise” on light sections of a picture

There would be tested 2 cameras: -Canon 5D mark II -Canon 1D X The second camera is the newest generation of top cameras from Canon, especially is interesting to compare it to the previous generation of cameras Canon 5D Mark II. Whether you…

Differences of medium format cameras Mamiya 645

mamiya

If you thought of a choice of medium camera, there is an option with Mamiya 645 one of the most attractive (if you already “outgrew” the Soviet cameras). Partly because Mamiya belongs to the PhaseOne companies, being at the moment the leader of…

ISO: Is there a reduction of noise on new matrixes?

5

A few technical and theoretical data on ISO (sensitivity) Light through a lens arrives on a camera sensor. On a sensor there are microlenses which focus light from the bigger square at photo cells. Photo cells convert photons in an electrical charge which…

Canon 5D mark II vs Canon 5D mark III (part 2, “noise” on high ISO)

Testing method All cameras were set on a tripod. The luminous heads connected to the studio Broncolor Grafit generator are a source of impulse light. It allows to regulate illuminance precisely (to reduce it on 1 step) and to avoid “stirrer”, “freezing” of…

Canon 5D mark II vs Canon 5D

The camera Canon 5D not strongly differs from the Canon 5D Mark II. I marked it with color circles: — yellow, the moved buttons — blue, the buttons which disappeared on new model — red, the buttons which appeared on new model which…

Canon 5D mark III vs Canon 5D mark II

6

With the Canon 5D Mark II everything seems clear — the first revolutionary camera which allowed to be engaged for smaller money in professional activity. And what about Canon 5D mark III? Today, when I have this camera, I can speak with deep…

Walks with Mamiya DF + and a digital back Leaf Credo 40

1

I did not show normal daily pictures from this camera, that readers of the blog could judge those advantages which can give the similar camera and I didn’t describe its restriction – where it is better to use the reflex or non-reflex camera.…

Comparing of sensors: Canon vs Sony

On Sony Nex6 there is the same sensor, as on Sony NEX 5R. So I compare Sony NEX 5R and the Canon 5D Mark II on high ISO. I provide the relevant data with DxO. From these data DxO we see that Sony…

Impressions of Sony A7

2

This photo-camera wasn’t surveyed only by the lazy. Nevertheless I know what to add. It is a great camera, revolutionary. Full frame and whole 24 Mpx. From the top, you can see a castor of an exposure control (it can change with control…

Exposure and exposure metering

0

Now, when photo-cameras are literally typed by the latest electronics many beginning photographers have the impression, that the camera is capable to define illumination of the shot and appear of re-exposure or under-light, there are feelings that somewhere the vendor of the camera…

Installation of Jupiter-9 M42/Jupiter-9 (clone of Carl Zeiss Sonnar 85/2) on Nikon via the no-lens adapter

I was engaged in this alteration for the reason that my black Jupiter-9 1987 is too “fuzzy” on an open diaphragm. It gave much more smaller sharpness, than my old Jupiter-9 under a Kiev photocamera. I solved this problem having caught the high-quality…

To dis-mental Helios 81H

helios 81h

In series lenses Helios 81 there is a failure connected to pollution of a crown of a lens oils and metal dust. Visually this failure looks as slow closing of a diaphragm at the time of working off of an exposure — “the…

The lens Nikon AF-S Nikkor 50mm f/1.4G — repair of an autofocus

Nikon AF-S Nikkor 50mm f1.4G

At last we reached the lenses Nikon. In this article you will pass a short course of digression on disassembling and assembly of the lens Nikon AF-S Nikkor 50mm f/1.4G . We will look, whether so it differs to quality of construct from…

A dandelion chip for adapters to manual lenses

2

Just asked the question what chip is better and I decided to write the thoughts here that there was no speculation in information by sellers of chips. Vendors of dandelion chips 1. V. Lushnikov (Russia) 2. Big-Is (China) 3. optixpcb (Hong Kong?) The…

Problem of re-exposure and exposition during the use of adapters with manual lenses

Many readers of my blog use not auto-focal lenses, so I decided to share information on this subject with all to whom it can be interesting. A light meter works regardless of the fact that transfers a dandelion. It influences only on flash-out…