Friday, January 28, 2011
Stock photos are largely professional, or semi-professional presentation and sale of images made through websites. The above-mentioned thematic web sites are nothing more than `stores`, magazines often contain several million images. Professional stock agencies enableselling photos even to novice photographers, provided that certain criteria are met, and actually a lot criteria.
Monday, January 24, 2011
Thursday, January 13, 2011
Camera obscura is a box or a locked room to which the light enters the interior through a small hole. Hence the name comes from the Latin camera obscura, a darkened room. Image of the pinhole camera is created on the basis of the intersection of the rays extending from the subject, which form on the film discs. The size depends on the diameter of the pinhole and the distance at which the photosensitive material is placed. However, the camera lens glass refract the rays from the object and focus the camera obscura to form punkty. The history of Camera Obscura dates back to ancient Egypt. Reportedly, the priests of Amun god Ra - the Sun God during the reign of Anenhotepa III were already familiar with the image capture. This hypothesis was announced by McCarter in 1928. This hypothesis was not confirmed until today.
Monday, January 10, 2011
I concluded that the rule of the inverse of the focal lenght has been adopted rather empirically, so there is nothing to hold on to this principle. Besides, it is not going to be linear, so it is not worth it to keep rigidly to this principle. Time to rev gave in the case of the calculator is 300 x 1.8 1 / 480 which means 1 / 500 exposure time.
But I suppose as a rule of thumb it gives you good idea on when to shoot from hand and when to use a tripod.