Timeline for Sensor size, reducers / teleconverters, and DOF
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 27, 2022 at 22:08 | comment | added | Michael C | It is the same sensor. The EXACT same sensor. It is not the same lens system when additional optical elements are added. The entire optical formula of a lens system determines what the image projected by it looks like. You're encouraging confusion and misunderstanding by stating things that are demonstrably false. | |
| Feb 26, 2022 at 22:15 | comment | added | zakray | @MichaelC I mean the reality is it’s not a different sensor and it’s not a different lens. If visualizing it one way or the other helps to understand, I don’t see what’s wrong with that. | |
| Feb 25, 2022 at 23:14 | comment | added | Michael C | The sensor doesn't act in any way different, no matter what is in front of it. Whatever lens is in front of the sensor acts like a lens. A lens + TC acts like a different lens system, because that's what it IS, a different lens. Saying adding a TC "changes the way the sensor acts" is just muddying the waters and leads to confusion. | |
| Feb 25, 2022 at 21:45 | comment | added | Steven Kersting | @MichaelC ... by magnifying/spreading the image circle the sensor acts like a crop sensor relative to the larger image circle size. I was actually surprised to find that they don't even mask off the unused image circle and rely on the black flocking/coating instead (at least Nikon's TC's don't). | |
| Feb 25, 2022 at 20:00 | comment | added | Michael C | @zakray As already stated at the beginning of this answer, "Just because you understand a certain proposition does not make it a correct proposition." | |
| Feb 25, 2022 at 19:56 | comment | added | Michael C | @StevenKersting A TC does not do anything to your sensor. It enlarges (spreads light out) before it reaches the sensor. It causes the total lens system to "act" like a longer, slower lens because the lens + TC IS a longer slower lens than the lens without TC. | |
| Feb 24, 2022 at 15:19 | comment | added | zakray | Thanks so much for the detailed response Michael. I'm marking Steven's answer as correct because I found it a bit easier to digest but yours definitely contributed to my understanding. | |
| Feb 24, 2022 at 14:50 | comment | added | Steven Kersting | A teleconverter is nothing more than a fancy magnifier; it enlarges the image circle making your sensor into more of a crop sensor... so yes, it affects (reduces) the DoF and exposure exactly as a longer/slower telephoto lens would. | |
| Feb 24, 2022 at 14:10 | history | edited | Michael C | CC BY-SA 4.0 |
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| Feb 24, 2022 at 0:19 | comment | added | zakray | Assume that I insert a teleconverter between the lens and camera. I change nothing else. Does DOF change? | |
| Feb 23, 2022 at 20:56 | history | answered | Michael C | CC BY-SA 4.0 |