Opticallimits

https://photorumors.com/2020/07/05/new-c...00mm-f-11/

Ugly as hell but I like the idea behind them.

I'm more excited by the 100-500mm though.

They are indeed not very handsome. And unexpected that they not only are "DO" but also weirdly "collapsable" ?

The 85mm f2 is pretty neat, with its 1:2 macro.
Rumour went around that the extenders would fit on any lens, even though the leaked "RF" range image made that pretty uncertain. That is now a definite no.

They look cheap frankly ..... so let's hope they are !!
  
Canon 600mm F11 ..... as I stated before "retractable" ..... 199.5m vs 260.7mm  ..... of the G2.  .... no stated length extended.


4.5 mts MFD is another disappointment ...... max mag. 0.14X ... rules out most insect photography .....


Tamron G2 

MFD 2.2 mts ...... max. mag. 1:39X ... great for butterflies etc.

Weight is significantly different : 930 gms the Canon .... 1.830 kgs the G2 without hood and tripod foot (as shown by the Canon image)

 
  The 800mm F11 ........ 
 .......seems a more realistic proposition and has an MFD of 6 mts with a max mag of 0.14X ...... not great either but there's no other alternative in the light weight division .... 

  It's a pity Canon missed the MFD trick ......... making the lenses a one trick pony .........

.........  a three legged one

With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

(07-06-2020, 10:32 AM)Brightcolours Wrote: [ -> ]With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

....... not to be confused with the G1!!


https://www.tamron.eu/lenses/sp-150-600mm-f5-63-di-vc-usd-g2/

(07-06-2020, 09:59 AM)davidmanze Wrote: [ -> ]making the lenses a one trick pony .........

.........  a three legged one

Dunno why manufacturers are going this way, after Nikon unicorn (58mmf0.95) we have Canon three legged pony... what next ?? Sigma dragon ?? oh wait Sigma has already several dragons....

(07-06-2020, 10:43 AM)davidmanze Wrote: [ -> ]

(07-06-2020, 10:32 AM)Brightcolours Wrote: [ -> ]With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

       ....... not to be confused with the G1!!


https://www.tamron.eu/lenses/sp-150-600mm-f5-63-di-vc-usd-g2/

1:39X is still not a thing, no matter if you write G1 or G2. Both do 0.26x, by the way.

(07-06-2020, 03:02 PM)Brightcolours Wrote: [ -> ]

(07-06-2020, 10:43 AM)davidmanze Wrote: [ -> ]

(07-06-2020, 10:32 AM)Brightcolours Wrote: [ -> ]With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

       ....... not to be confused with the G1!!


https://www.tamron.eu/lenses/sp-150-600mm-f5-63-di-vc-usd-g2/

1:39X is still not a thing, no matter if you write G1 or G2. Both do 0.26x, by the way.

  What do you mean by a thing exactly  ??

(07-06-2020, 03:27 PM)davidmanze Wrote: [ -> ]

(07-06-2020, 03:02 PM)Brightcolours Wrote: [ -> ]

(07-06-2020, 10:43 AM)davidmanze Wrote: [ -> ]

(07-06-2020, 10:32 AM)Brightcolours Wrote: [ -> ]With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

       ....... not to be confused with the G1!!


https://www.tamron.eu/lenses/sp-150-600mm-f5-63-di-vc-usd-g2/

1:39X is still not a thing, no matter if you write G1 or G2. Both do 0.26x, by the way.

  What do you mean by a thing exactly  ??

It is either something is either a ratio (1:2 for instance) or a magnification (times something), like 0.5X. So not 1:39X. And 1:39 would be 0.0256x max. magnification, which does not seem right either. 

(07-06-2020, 03:46 PM)Brightcolours Wrote: [ -> ]

(07-06-2020, 03:27 PM)davidmanze Wrote: [ -> ]

(07-06-2020, 03:02 PM)Brightcolours Wrote: [ -> ]

(07-06-2020, 10:43 AM)davidmanze Wrote: [ -> ]

(07-06-2020, 10:32 AM)Brightcolours Wrote: [ -> ]With the small size (DO) they do not have the room, probably, to make a longer focus path, hence the "long" MFD.
1:39X is not a thing, though. The Tamron you refer is said to do 0.26X max.mag.

       ....... not to be confused with the G1!!


https://www.tamron.eu/lenses/sp-150-600mm-f5-63-di-vc-usd-g2/

1:39X is still not a thing, no matter if you write G1 or G2. Both do 0.26x, by the way.

  What do you mean by a thing exactly  ??

It is either something is either a ratio (1:2 for instance) or a magnification (times something), like 0.5X. So not 1:39X. And 1:39 would be 0.0256x max. magnification, which does not seem right either. 

   I'm now confused too about maths .... but which ever way you roll the dice  a ratio of "1:0.14" is pretty poor on the magnification scale of things ......

---

Tamron G2 MFD max mag 1:0.39 ..... magnification equals 0.39 squared = 0.1521X     ...... maybe