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Are Fixed F-stop lenses worth buying?
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Dec 18, 2020 11:49:26   #
gwilliams6
 
CPR wrote:
In long lenses like that the cost goes up by huge increments as you bring the f-stop down. The cost, and the size and weight, go way up and up. And UP.
It's a trade off that most don't choose to make.


Exactly right. You will pay over 10k to 13k if you want a 600mm f4 lens that comes with 1.4X and 2X teleconverters from most makers. The f11 long lenses fit more budgets, you just have to deal with f11, using higher ISO if you dont have bright light. Even at f11, when you are at 800mm you can have shallow depth of field and soft backgrounds. Remember three things determine depth of field: 1) aperture, 2) focal length, 3) distance from camera to subject.

For my Sony system I went with the superb 200-600mm f5.6-6.3 for 2K vs paying 13K for a Sony 600mm f4 with the 1.4X and 2X teleconverters. I do also own the Sony 1.4X and 2X teleconverters that I use with my 200-600mm f5.6-6.3 lens. I just have to up the ISO when necessary. The results are very good. Cheers

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Dec 18, 2020 12:16:01   #
xt2 Loc: British Columbia, Canada
 
CHG_CANON wrote:
All the feedback on these cheaper primes says their wonderful, for the price. You'll probably get more from actual reviews than UHH henhouse chatter. Try google for video based images. Here's Bryan Carnathan's 600 review, with real image examples:

https://www.the-digital-picture.com/Reviews/Canon-RF-600mm-F11-IS-STM-Lens.aspx



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Dec 18, 2020 12:17:14   #
xt2 Loc: British Columbia, Canada
 
CHG_CANON wrote:
The lens is intended exclusively for EOS mirrorless full-frame cameras, where 'brightness of the view finder' is not an applicable issue nor concern. As modern and market leading digital technology, the ISO can be adjust to assure an excellent image with the shutter speed needed for the composition.



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Dec 18, 2020 15:13:09   #
n3eg Loc: West coast USA
 
I use fixed 400mm and 500mm lenses on micro four thirds. Works fine for me.

I also have a 650-1300 f/8-f/16 which is technically a fixed aperture zoom. Not the sharpest lens in the shed, but it works.

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Dec 18, 2020 15:15:04   #
CHG_CANON Loc: the Windy City
 
On the road to success, it's surprising how often we're now seeing EOS mirrorless cameras with RF fixed aperture lenses at the 600mm and 800mm focal lengths.

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Dec 19, 2020 09:46:21   #
Blurryeyed Loc: NC Mountains.
 
Roe Cole wrote:
I recently purchased a Canon EOS R with the newer RF mount. Great camera but I was surprised at the costs of those lenses. I’m retired on a fixed income so I don’t want to error on a lens purchase.

I’m looking for a lens for wildlife in the 600-800mm range. I’m considering a Canon RF 800mm that I can purchase new for $900 BUT this glass is fixed at f-11.

As background, I typically shoot at f-8 or lower for background blur in nature photography. I also want to step up the quality of my photos.

SO my question - is a fixed aperture lens at f-11 worth buying? Would I be disappointed at the image quality or lack of f-stop control of this lens?

Your constructive feedback will be greatly appreciated. Thank you in advance.
I recently purchased a Canon EOS R with the newer ... (show quote)


Some of the reviews on that lens have been less than stellar, yes, a 800mm lens for that price is exciting but I would also consider the Sigma 150 - 600 which is currently on sale for the same price. I have owned the R and now shoot with an R5 and my EF lenses work just fine with the EF to RF adapter that should have come with your camera. It is a hard decision for me to move to the RF lenses when I already own really good EF glass.

https://www.adorama.com/l/?searchinfo=sigma%20150-600mm%20f5-6.3%20dg%20os&sel=Item-Condition_New-Items

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Dec 19, 2020 12:48:16   #
gwilliams6
 
Blurryeyed wrote:
Some of the reviews on that lens have been less than stellar, yes, a 800mm lens for that price is exciting but I would also consider the Sigma 150 - 600 which is currently on sale for the same price. I have owned the R and now shoot with an R5 and my EF lenses work just fine with the EF to RF adapter that should have come with your camera. It is a hard decision for me to move to the RF lenses when I already own really good EF glass.

https://www.adorama.com/l/?searchinfo=sigma%20150-600mm%20f5-6.3%20dg%20os&sel=Item-Condition_New-Items
Some of the reviews on that lens have been less th... (show quote)



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Dec 19, 2020 13:17:02   #
wdross Loc: Castle Rock, Colorado
 
Roe Cole wrote:
I recently purchased a Canon EOS R with the newer RF mount. Great camera but I was surprised at the costs of those lenses. I’m retired on a fixed income so I don’t want to error on a lens purchase.

I’m looking for a lens for wildlife in the 600-800mm range. I’m considering a Canon RF 800mm that I can purchase new for $900 BUT this glass is fixed at f-11.

As background, I typically shoot at f-8 or lower for background blur in nature photography. I also want to step up the quality of my photos.

SO my question - is a fixed aperture lens at f-11 worth buying? Would I be disappointed at the image quality or lack of f-stop control of this lens?

Your constructive feedback will be greatly appreciated. Thank you in advance.
I recently purchased a Canon EOS R with the newer ... (show quote)


One point that Blurryeyed and gwilliams6 have made, if it is not your intent to make this 800 f11 lens your one and only long lens, it may be better to save or spend the extra money to get a more versatile lens rather than spend your money twice - once for the 800 f11 now and then again for a more versatile lens later.

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Dec 19, 2020 20:31:07   #
GPjake
 
bleirer wrote:
I recently agonized over how to spend my $1000 for a telephoto for the RP, about half of your R5 pixel count, since that was my budget. Read a lot of reviews, looked at comparison images, etc. From all that I suspect you might be disappointed with the 800. It will be interesting to see what actual shooters say. Though the price is right.

If you can swing it the 100-500 with the 1.4x, or for less money a used ef 100-400 ii with a 1.4x, but my opinion is only based on research. Since you have IBIS you would also get very sharp images from the ef 400mm 5.6L with the 1.4x. I rented that one for a summer trip, very nice. Of course all of those options are more than twice the cost of the 800. I ended up with the version i 100-400 with a version ii 1.4x, that was within the budget, but I am still tasting the better lenses.


I spent a lot of time reading the reviews here.
https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1513&Camera=1508&Sample=0&FLI=0&API=0&LensComp=972&CameraComp=979&SampleComp=0&FLIComp=5&APIComp=2
I recently agonized over how to spend my $1000 for... (show quote)

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Dec 19, 2020 22:42:58   #
gwilliams6
 
wdross wrote:
One point that Blurryeyed and gwilliams6 have made, if it is not your intent to make this 800 f11 lens your one and only long lens, it may be better to save or spend the extra money to get a more versatile lens rather than spend your money twice - once for the 800 f11 now and then again for a more versatile lens later.



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