Doing the Math (Page 6): A good practical result, that confirms what theory said. Whats recorded on the sensor is dependent on the focal length of the lens the size of the sensor and...

blackest Loc: Ireland

Brucej67 wrote:

First let me apologize to the OP for bad advice then to the group for being argumentative, I have been doing photography for 53 years and there is probably a lot I don't know and this was one of them, I was trying to be helpful but empirical evidence proves me wrong and I post this as my test results which proves everyone else right. Though I still don't understand why I do believe what everyone is saying.

A good practical result, that confirms what theory said.

Whats recorded on the sensor is dependent on the focal length of the lens the size of the sensor and the physical construction of the lens (which sets the size of the image circle). The aperture used can also come into play. If you have filters stacked on a lens then at an aperture of say 2.8 you might get noticeable vignetting but at f8 none.

Anyway as a thought experiment consider a projector displaying an image on a wall you could perhaps tape some photo sensitive paper to the wall if say one piece was A4 and another A5 more of the projected image would be recorded on the A4 than the A5 simply because of the difference in papersize.

your field of view is limited by the paper size.

rehess Loc: South Bend, Indiana, USA

Brucej67 wrote:

First let me apologize to the OP for bad advice then to the group for being argumentative, I have been doing photography for 53 years and there is probably a lot I don't know and this was one of them, I was trying to be helpful but empirical evidence proves me wrong and I post this as my test results which proves everyone else right. Though I still don't understand why I do believe what everyone is saying.

Thank you for being honest.

I still believe your confusion comes from our long practice of describing view in terms of focal length. That is true only as long as the sensor remains invariant, which was largely true in the days of film, but totally confusing today.

Brucej67 Loc: Cary, NC

Well you are right and it confused me, the world has changed and some of us are slow to catch up.

rehess wrote:

Thank you for being honest.

I still believe your confusion comes from our long practice of describing view in terms of focal length. That is true only as long as the sensor remains invariant, which was largely true in the days of film, but totally confusing today.

tdekany Loc: Oregon

blackest wrote:

It's a fair test and should confirm what we believe to be true. Deserves its own thread as it should be a definitive answer.
At 8 feet from the target horizontal fov should be 16 feet for the full frame and around 10ft 8 for the crop sensor with Nikon.
Although whats seen through the view finder may not agree if it has less than 100% coverage, the photos should match up.

markngolf Loc: Bridgewater, NJ

Bill_de wrote:

It's all related. If you can't see the relationship that's just a shame. Your posts are not going to change that, so why not just sit back and enjoy watching how the discussion unfolds. Or, if it is not to your liking, go read something else.

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Let's all chip in and send him some more obnoxious/nasty/go away pills. He's exhausted his supply.
Mark