400mm f/2.8 II outperforms Hubble

[AlanF]

http://www.symmetrymagazine.org/article/99-percent-invisible

So, you thought you had a lot of lenses.

 

[Loswr]

Re: 400mm f/4 II outperforms Hubble

I believe the Dragonfly Array uses Canon 400mm f/2.8 II lenses, not 400mm f/4 (DO I/II).

 

[privatebydesign]

Re: 400mm f/4 II outperforms Hubble

Yep the 2.8 IS MkII, because of the coatings the MkII brought to the table.

It has been an interesting growth and commented on in a few threads here.

http://www.dunlap.utoronto.ca/instrumentation/dragonfly/

 

[IglooEater]

Re: 400mm f/4 II outperforms Hubble

I believe the Dragonfly Array uses Canon 400mm f/2.8 II lenses, not 400mm f/4 (DO I/II).

Yup 2.8
In a little more detail: http://www.astro.caltech.edu/~ycao/B&ETalks/vandokkum_bne.pdf

 

[ethanz]

Re: 400mm f/4 II outperforms Hubble

Very interesting original article, but where are the images? I'd love to see what kind of image it creates.

The PDF does show some images.

 

[AlanF]

Re: 400mm f/4 II outperforms Hubble

I believe the Dragonfly Array uses Canon 400mm f/2.8 II lenses, not 400mm f/4 (DO I/II).

Now corrected!

 

[Mikehit]

Re: 400mm f/4 II outperforms Hubble

Very interesting original article, but where are the images? I'd love to see what kind of image it creates.

The PDF does show some images.

There are links in this article:

http://www.dunlap.utoronto.ca/instrumentation/dragonfly/

 

[Maximilian]

Thanks for sharing, Alan.

Really interesting astro stuff.

 

[Steve Dmark2]

When they disassemble the array, can i have on of those 400mm 2.8 ii ?
For free?