35mm echivalent prime for APSC

Zoltan Ilyes wrote:

Hi,

I would like to start with an assumption: if you mount a 35mm EF lens (say 35mm f1.4 L) on an APS-C body it will give you the same field of view as a 56 mm (35*1.6) EF-S lens mounted on the same body -

Wrong.

A EF 35mm f1.4 L USM or EF 35mm f2 IS USM lens on APS-C will give the same FOV as a EF-S 35mm lens on APS-C, if such a EF-S lens would exist.

A 56mm EF-S lens on APS-C will give the same FOV as a EF 56mm lens on APS-C also.

However, a 35mm lens on APS-C will give the same FOV as a 56mm lens on full frame.

because the sensor actually is not using the entire part of the glass, just 1/1.6th of that.

Please correct me if my assumption is incorrect as that makes the entire question void.

But if my assumption is correct, what are my lens possibilities for a (around) 35mm focal length equivalent fast (f1.8) prime for an APS-C body?

If you want 35mm on APS-C, the options are:

• Canon EF 35mm f2
• Canon EF 35mm f2 IS USM
• Canon EF 35mm f1.4 L USM
• Canon EF 35mm f1.4 L USM II
• Tamron 35mm f1.8 USD VC
• Sigma 35mm f1.4 Art
• Sigma 30mm f1.4 EX DC Art (APS-C only)
• Samyang 35mm f1.4 (manual focus only)
• Zeiss 35mm f1.4  (manual focus only)

I've searched through my local vendor's list and actually the single EF-S prime I found is the 24mm f2.8, but that is too slow. Did not had better luck searching the net either as all I could found were EF lenses.

Above your wording, within your confusion about EF and EF-S lenses, states you want 35mm on APS-C. Here, you seem to say you want the FOV 35mm gives on full frame, on your APS-C camera.

If you want the FOV a 35mm lens gives on full frame, for your APS-C camera, these come close:

• Voigtlander 20mm f3.5 SL II N (manual focus only, too slow)
• Sigma 20mm f1.8 (old lens)
• Sigma 20mm f1.4 Art (big, heavy, expensive, very good)
• Sigma 24mm f1.8 (old lens)
• Sigma 24mm f1.4 Art
• Canon EF 20mm f2.8 (too slow)
• Canon EF-S 24mm f2.8 STM (too slow you say)
• Canon EF 24mm f2.8 IS USM (too slow)
• Canon EF 24mm f1.4 L USM

Two zoom lenses to consider;

• Sigma 18-35mm f1.8 DC (APS-C only)
• Tokina 14-20mm f2 DX (APS-C only)

Both are very good zoom lenses.

Thanks.