Super stacked teleconverters: Life @ 1880mm

[GuyF]

Alan,

Depth of field isn't very good. Are you back focussing? Yes....by about 120,000 miles :'(

Regards.

 

[noisejammer]

Okay, I just stacked all my TCs and pointed it all at the moon and here's the result. A bit of chroma sneaking in but not bad considering the moon was behind cloud and below the horizon.

10.0 10.0 10.0 10.0 10.0 & 10.0

 

[yorgasor]

There was a thread about this. Stacked Canon TCs will focus at infinity. I think that the recommended order is Lens - 2xTC - 12mm extension tube - 1.4xTC - camera.

Sure enough, that actually worked for me. For some reason, swapping the 2x TC and the 1.4x TC didn't let me focus to infinity. At any rate, this is what I shot tonight to show off the results. I used the Nikon 300mm f/4, 2x, 1.4x on a 7D2, with an effective range of 1344mm:

Moon at 1344mm by yorgasor, on Flickr

I should probably brighten it up a notch. It seems my primary photo display appears a little brighter at night.

 

[Mt Spokane Photography]

I tried stacking my 1.4XII and 2XII on my 600mmL and 1D MK III for a 21XX equivalent focal length. The result was poor, and it still wasn't long enough.

This one is from yesterday with 1200mm equiv using my SX50. Its viewable, but not pretty.

That nest is in the top of a very high power transmission line tower. I think thenest must be 5 ft deep or more. It took them 3 years to build.