RF-S Lenses - What We Know and What is Rumored

musicmaster wrote:

MikeJ9116 wrote:

Not to mention that the lenses referenced like the RF 100-400mm, the 600mm/800mm and others are not all that bright. If one says the 17-55mm f/2.8 wasn't fast enough for them then how can 600mm/800mm lenses at f/11,and the RF 100-400mm, be something they can recommend? Especially on a crop camera where the use cases for a f/11 lens is so narrow it makes them almost unusable. Even the RF 100-400mm is limited on a crop camera.

Why does the aperture being F/11 make a difference on a crop vs a full frame? It will focus the same, just using the inner 1.6x of the lens.

I assume most buying the 600 and 800 are wildlife / bird photographers where you are outdoors anyways.

On DSLR’s, the issues with slow lenses were the inability to focus if the max aperture was narrower  than f/8 (generally but with exceptions) and poor sensor performance at high ISO that produced noice and banding.   Mirrorless has solved the first problem and a combination of better sensors (in some cases) and better software has ameliorated the second.  Personally, I think I was programmed to avoid high ISO settings above 3200 based on what I read. When I got an RP, I was amazed how well ISO 10,000 or 12,000 could look with a little effort.  I did rent the 600mm once and used it at a bird park - both outside and in a birdhouse. It was a bit challenging inside - you needed a non moving subject because fast shutter speeds were just not possible. And even when a bird is stationary, it is still moving some part of its body.

MikeJ9116 wrote:

musicmaster wrote:

MikeJ9116 wrote:

Not to mention that the lenses referenced like the RF 100-400mm, the 600mm/800mm and others are not all that bright. If one says the 17-55mm f/2.8 wasn't fast enough for them then how can 600mm/800mm lenses at f/11,and the RF 100-400mm, be something they can recommend? Especially on a crop camera where the use cases for a f/11 lens is so narrow it makes them almost unusable. Even the RF 100-400mm is limited on a crop camera.

Why does the aperture being F/11 make a difference on a crop vs a full frame? It will focus the same, just using the inner 1.6x of the lens.

I assume most buying the 600 and 800 are wildlife / bird photographers where you are outdoors anyways.

If you are trying to defend using an f/11 constant aperture long zoom on a crop camera then god bless you for trying.

f/6.3 is about the slowest lens I would dream of using on crop.

KEG wrote:

MikeJ9116 wrote:

musicmaster wrote:

MikeJ9116 wrote:

Not to mention that the lenses referenced like the RF 100-400mm, the 600mm/800mm and others are not all that bright. If one says the 17-55mm f/2.8 wasn't fast enough for them then how can 600mm/800mm lenses at f/11,and the RF 100-400mm, be something they can recommend? Especially on a crop camera where the use cases for a f/11 lens is so narrow it makes them almost unusable. Even the RF 100-400mm is limited on a crop camera.

Why does the aperture being F/11 make a difference on a crop vs a full frame? It will focus the same, just using the inner 1.6x of the lens.

I assume most buying the 600 and 800 are wildlife / bird photographers where you are outdoors anyways.

If you are trying to defend using an f/11 constant aperture long zoom on a crop camera then god bless you for trying.

f/6.3 is about the slowest lens I would dream of using on crop.

By 2030 lots of Canon lenses will be f/11 ?

It is a sensor of the future thing ?

A f/11 lens would not be as useful on a 10D ?

KEG wrote:

MikeJ9116 wrote:

musicmaster wrote:

MikeJ9116 wrote:

Not to mention that the lenses referenced like the RF 100-400mm, the 600mm/800mm and others are not all that bright. If one says the 17-55mm f/2.8 wasn't fast enough for them then how can 600mm/800mm lenses at f/11,and the RF 100-400mm, be something they can recommend? Especially on a crop camera where the use cases for a f/11 lens is so narrow it makes them almost unusable. Even the RF 100-400mm is limited on a crop camera.

Why does the aperture being F/11 make a difference on a crop vs a full frame? It will focus the same, just using the inner 1.6x of the lens.

I assume most buying the 600 and 800 are wildlife / bird photographers where you are outdoors anyways.

If you are trying to defend using an f/11 constant aperture long zoom on a crop camera then god bless you for trying.

f/6.3 is about the slowest lens I would dream of using on crop.

The RF100-500L works great on the R7 at f/7.1 and gets only more versatile if you're willing to use fancy noise reduction in post, like DxO and Topaz offer. But even without NR, it's a great combination to use.

MikeJ9116 wrote:

KEG wrote:

MikeJ9116 wrote:

musicmaster wrote:

MikeJ9116 wrote:

Not to mention that the lenses referenced like the RF 100-400mm, the 600mm/800mm and others are not all that bright. If one says the 17-55mm f/2.8 wasn't fast enough for them then how can 600mm/800mm lenses at f/11,and the RF 100-400mm, be something they can recommend? Especially on a crop camera where the use cases for a f/11 lens is so narrow it makes them almost unusable. Even the RF 100-400mm is limited on a crop camera.

Why does the aperture being F/11 make a difference on a crop vs a full frame? It will focus the same, just using the inner 1.6x of the lens.

I assume most buying the 600 and 800 are wildlife / bird photographers where you are outdoors anyways.

If you are trying to defend using an f/11 constant aperture long zoom on a crop camera then god bless you for trying.

f/6.3 is about the slowest lens I would dream of using on crop.

My slowest is f/5.6 with the only exception being the EF-M 15-45mm and I put up with it because of its focal range, size and lightweight.

again, these f8 and f11 lenses are specialty lenses for birding and field sports outdoors in good light

and again, they provide a great value for those involved in these specialty activities -- which apparently you are not involved

for example, the best birding reviewer on the planet says the $2000 R7 + RF 100 -400 is the best value proposition for those just getting into birding vs all the older stuff for similar dollars