Wednesday, January 7, 2009
Canon 200mm f1.8 lens
My new camera lens is a World fastest telelens, Canon EF 200mm f1.8L.
Here is some information:
-
This lens has best difraction limited optical quality I have seen.
Lens is used in SuperWASP project, actually eight of them:
http://www.superwasp.org/
UPDATE
Astronomical images shot with this lens can be seen here:
http://www.astroanarchy.blogspot.com/search/label/Canon%20200mm%20f1.8%20images
UPDATE
Astronomical images shot with this lens can be seen here:
http://www.astroanarchy.blogspot.com/search/label/Canon%20200mm%20f1.8%20images
-
The model I bought is electronically focused, so there is no mechanical link between lenses and
focusin ring. After lots of thinking I ended up to modify the lens for the astro work.
Opening up and messing with electronic and mechanic of the expencive lens was not a
easy decision, but it was the only way to use it with my new astrocamera, QHY9.
-
Modification:
-
removing the original Canon bajonet
-
cutting off all the wires between the lens and the bajonet
-
soldering an extencion cord between the lens and the bajonet
-
attachment of the M42 ,75mm thread to the lens end
-
Aftger the modification I can use any EOS Canon body to powering up and adjust the lens
-
Images of the modification:
Original wires are cutted and extencions soldered in.
Canon bajonet with cutted wires.
Extencion cords are soldered to the bajonet.
M42 ,75mm thread is attached to lens end.
Allmost ready assembly.
-
As you can see from the images I used the lenses filter holder as a route for the cords.
(The canon holder is too small for 2" astronomical filters.)
After final image I wrap some aluminium foil around the lens end to
prevent any light leaks. The foil was then attached with
Black tape around it.
After the modification the lens can be controlled with any unexpencive EOS body.
I build a power source for the EOS body, so there is
no need for the batterys.
Saturday, December 13, 2008
Veil Movie3
Large version of the Veil 3D animation.
Download a high resolution movie fille here, 18MB:
http://www.mediafire.com/file/43z2mm2qzqg/Movie_0001.wmv
The higher resolution movie, 62MB, can be downloaded from here:
http://www.mediafire.com/?sharekey=ca05761aad8b3134d2db6fb9a8902bda
Friday, December 12, 2008
Thursday, December 11, 2008
Veil 3D-movie
This is really interesting! (least to me)
I divided the original 2D-Veil image to the layers by the content.
(parts of nebula, stars by size and the background)
Each layer was then projected to the 3D-surface.
The main principle is about the same as in Stereo Pair images.
In this tecnique the data is really in 3D-format though.
I think this video tels a lot about nature of this object as a 3D bubble, leftovers from
massive explosion, Supernova.
NOTE. This is not a accurate model, it's more like an educated guess about appearance.
The original 2D-image, with imaging details, can be found here:
http://astroanarchy.blogspot.com/2008/10/veil-nebula-in-hubble-palette.html
3d-stero pair image is here:
http://astroanarchy.blogspot.com/2008/10/stereo-image-pair-of-veil-nebula.html
and
Stero pair animation! of exploding star is here:
http://i36.tinypic.com/16aty7n.gif
There is couple of hick-ups in the video, since I'm very new with any animation techniques, yet.
Video compression kils the movie here. Original
HD-quality movie has stunning details and about zilion and half more stars.
Subscribe to:
Posts (Atom)
