Wide angle lenses for 8x10

[Steven Ruttenberg]

That looks cool. Any images of the sky you would share?

Ebay has this one in a shutter for 580. Commercial Ektar 14 in. Lens

[Pere Casals]

Commercial Ektar 14 in.

this tessar was a favourite of Youssuf Karsh, IIRC

[James Morris]

The SSXL 150 is an incredible lens but because of the design, there is considerable light falloff and you will need a CF. They are expensive. 150mm is very wide for 8x10 and I ended up selling mine.


Mosman, NSW (2014) by James Morris, on Flickr

[angusparker]

SSXL 150mm?

+1 Movements and not too big, the best modern WA lens for 8x10 IMHO...


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[angusparker]

The SSXL 150 is an incredible lens but because of the design, there is considerable light falloff and you will need a CF. They are expensive. 150mm is very wide for 8x10 and I ended up selling mine.


Mosman, NSW (2014) by James Morris, on Flickr

Light fall off doesn’t bother me with B&W, probably would in color.


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[Steven Ruttenberg]

So many choices yet so little. I need to review the info provided here to make a decision. Probably 120-150 mm range and an extar 14in and Voigtlander 12in Universal Heliar.

[Steven Ruttenberg]

The SSXL 150 is an incredible lens but because of the design, there is considerable light falloff and you will need a CF. They are expensive. 150mm is very wide for 8x10 and I ended up selling mine.


Mosman, NSW (2014) by James Morris, on Flickr

Nice detail.

[LabRat]

Does anyone here regularly focus at infinity? I can’t remember the last time I did. I’ve used my 120 SA with 8x10. It worked fine.

There is infinity, and there is infinity!!!

With my 400mm astronomy telescope, I have to slightly refocus it when it is focused on the moon and I have to change to focus on the stars... ;-)

Steve K

[Havoc]

In astronomical terms, that is macro work you are doing

[Pere Casals]

There is infinity, and there is infinity!!!

With my 400mm astronomy telescope, I have to slightly refocus it when it is focused on the moon and I have to change to focus on the stars... ;-)

Steve K

Steve, I guess that in your case you don't have to slightly refocus because stars are farther than moon, as moon is around 384.400km far yet.


Perhaps the effective focal length of your telescope changes because atmosphere is part of your optic system, for example the moon and solar discs are seen way larger when they are in the horizon.


Very Large Telecope (etc) is even automated to modify the optics (Adaptive optics) to overcome several atmospheric effects, including atmospheric turbulence, this is assisted by lasers.

https://en.wikipedia.org/wiki/Adaptive_optics