[Jack Allegra]

(Gary Huff) “You already have more than enough information to calculate this.”

This is not the case
I do not have enough information.
Because I still do not understand the concept.

So,
Can anyone answer precisely and clearly to the question below?

Grazie a tutti per le risposte

Ma nel mio caso particolare non ho bisogno di calcolare la lunghezza focale equivalente a 35 mm, che è semplicemente un
confronto.

Ma il calcolo da fare è la lunghezza reale dell’obiettivo con il sensore full frame e il sensore APS (canon).

Così,

la famosa lente da 24 mm o da 70 mm con sensore full frame, cos’è?

Obiettivo 24mm o 70mm con il sensore APS (canonico), che cosa è?

[Jack Allegra]

Thanks to everyone for the answers

But in my particular case I do not need to calculate the focal length equivalent to 35 mm, which is simply a
comparison.

But the calculation to be made is the real length of the lens with the full frame sensor and the APS sensor (canon).

So,

The famous 24 mm or 70 mm lens with full frame sensor, what is it?

24mm or 70mm lens with the APS (canon) sensor, what is it?

[Jack Allegra]

Hi, warren

Thank you for the reply.

Different articles say the focal length never changes, or with a full frame sensor or a crop factor sensor.

So,
Because, according to your calculation, the 24 mm with the APS sensor becomes 38.4?