Tamron Still Believes in APS-C

Started 10 months ago | Discussions thread
ihgold2 Regular Member • Posts: 152
Re: Tamron is leaving $ MONEY $ on the table not making EF-M, Fuji-X lens

nnowak wrote:

ihgold2 wrote:

dwfrommonterey wrote:

Not everyone care to upgrade to Fullframe, majority of "consumer" don't want to spend $2000 when an $500~$1000 APS-C DSLR or Mirrorless will do.

Canon RP with decent kit lens $999. Right now.

That's a really tempting offer. Do you think f/7.1 is limiting though, in that kit lens? IQ notwithstanding, seems like f/7.1 being the largest possible aperture would be frustrating. What does everyone think?

f/7.1 on full frame is equivalent to f/4.5 on Canon APS-C crop. Yes, f/7.1 sounds slow, but when you consider that an equivalent EF-M lens would need to be 15-66mm f/2.5-4.5, f/7.1 suddenly looks pretty good. Going the other way, the EF-M 15-45mm f/3.5-6.3 is equivalent to a full frame 24-72mm f/5.6-10. After converting for equivalence, the EF-M 15-45mm ends up a full stop slower than the RF 24-105mm f/4-7.1.

No, f/7.1 is not ideal for low light use, but it is still better than any of the existing EF-M zooms.

Thanks, yeah, I guess that does put it in perspective.

Naive question then: hypothetical exposure, f/7.1, ISO 400 ... will those result in different shutter speeds one FF vs crop bodies?

I think I understand that the DOF, and maybe some other qualities of the image, will be different.  But is the exposure itself fundamentally calculated differently?

 ihgold2's gear list:ihgold2's gear list
Canon EOS M5 Canon EF 24-105mm f/4L IS USM Canon EF 70-200mm F4L IS USM Samyang 12mm F2.0 NCS CS Tamron SP 90mm F2.8 Di VC USD Macro +2 more
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