focal length

Hey all, I have been working on this for quite a while. I have created a comparison tool that helps people (particularly beginners) to see the difference, focal length and f-number make on different portraits. You can compare 35mm, 50mm, 85mm, 135mm, and 200mm. Depending on the chosen lens you...

Was going through some pictures from a car show, I'd taken two shots of the same car at different distances to the subject and different focal lengths. First, 24mm on an APS-C sensor: Then stepping back and zooming-in to 42mm with the same APS-C sensor: I can see each having their...

Hello. I have a question about DSLR lenses that has always bothered me, and it's about the focal length millimeter values. I know that the focal length is the length in millimeters between your sensor and the optical center of your lens, that is, a piont where the light rays collimate. But I...

Hi! I am using the 1,7x Nikon teleconverter with a 70-200mm/f2.8 and paradoxically the photos are blurred at a short focal length (e.g. 119mm) at a big aperture until I stop down up to f10 or so - but they are not when at 340mm under the same settings - so it is not a matter of depth of field or...

Hi. I'm interested in photographing furniture that I've built and I'm wondering what kind(s) of lenses would be best to shoot items like the images in the link below. I have a Panasonic GH4 and a 20mm 1.7 lens but I'm wondering if this will be a good fit? Is there a particular lens length that...

This may sound like a dumb question but maybe its because I fail to understand if shooting with a prime 35mm and shooting in either aperture priority of program mode, do I need to adjust the focal length on the camera settings and how? Please be kind, I'm here to learn.

Hello All, Sorta new to photography so I was wondering if anyone can help me out? I noticed in American Civil War era portraits, there seems to be a "look" that you don't see very often. It's hard to explain, but it looks like there is a very short focal length. Here is an example: Notice...

Is it possible to get the same depth of field with different lens? Let say If I want to get as shallow DOF as a 50mm can do at f1.8, but I only have a 24-105mm f4, so I zoom in to 105mm @ f4, will the DOF be the same like the 50mm @ f1.8? There might be a perspective compression difference but...