Monday, 27 February 2012

Depth of Field, Piece of Cake.

Thank God there is autofocus! Theory of depth of field from a Rollei Slr Manual.

Wednesday, 20 July 2011

The Case of the Fraudulent Photo.

Announcement of a serie from the British Television, Geoffrey Marland & T.W. Greer.

Monday, 13 June 2011

Projection Distance

There are some silly rules and mathematics in photography, here is a theoric base for setting up the distance for projection, as can be used for exhibition and flatscreen.

If L is the wideness of the projected area, then the first viewers has to sit at 3 times this measurement and the last one at 4,5 times this distance.

Not practical, cannot be used in cinemas and I think when I play the last version of my favorite killing game on my Playstation 3 on my 42 inch flatscreen, I would be complete out of the game.

Faulty Chinese or English to French in Instruction Manual

I know, when you aren't french born, this language is very difficult to learn. But this manual, from the Hong-Kong made Comax, has broken some records : 41 french grammatical mistakes. Maybe it was made in times that the spellchecker didn't exist, or the chinese/english keyboard didn't had the french accents...

Saturday, 11 June 2011

Faulty M39 Jupiter 11 on Leica IIIc

I found this beauty on a fleamarket in Ostend, Belgium. The price was 60 Euro. Nothing wrong with the Jupiter 11, the Leica IIIc has a slow first curtain and a bit faulty slow speeds, but that's for later,... The strange thing is : this russian lens was made for a the early Zenit's with a M39 fitting before the got the M42 lensfitting. This lens works only at closer distance because the distance between film and lens is different between M39 and M42. So this combination only works for macro. Can you imagine the impossible work to get something macro sharp with this rangefindercombination! Anyway good lens, good camera, good price, happy me!

Thursday, 9 June 2011

Pandemic E-coli Camera.

Due to the epidemy of e-coli in Europe, I highly recommend to decontaminate this camera before use!

Tuesday, 7 June 2011

Parallax error in photography

Parallax error can be seen when taking photos with many types of cameras, such as twin-lens reflex cameras and those including viewfinders (such as rangefinder cameras). In such cameras, the eye sees the subject through different optics (the viewfinder, or a second lens) than the one through which the photo is taken. As the viewfinder is often found above the lens of the camera, photos with parallax error are often slightly lower than intended, the classic example being the image of person with his or her head cropped off. This problem is addressed in single-lens reflex cameras, in which the viewfinder sees through the same lens through which the photo is taken (with the aid of a movable mirror), thus avoiding parallax error.(Source Wikipedia)