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  1. Galleries
  2. »
  3. Astrophotography
  4. » Rosette Nebula

 
Rosette Nebula...

Astrofotografia

View gallery (10 photos)

Rosette Nebula sent on February 25, 2015 (15:05) by Italo1. 5 comments, 1334 views.

Hypered TP6415 + Wratten 25 gelatin filter 60min Exp. time. Fotocamera autocostruita (con pressapellicola aspirante) per rullo 120 (6x6 cm.).




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avatarsenior
sent on March 06, 2015 (0:39) | This comment has been automatically translated (show/hide original)

Cabbage tool that you have designed ....! Flat field from the center to the edges, no sign of a coma, the fall of light or other .... the photo is beautiful .... but the fact that it is made with a tool that you designed by himself (or so it seems I understand reading here and) makes it a masterpiece.
Complimentoni

avatarjunior
sent on March 06, 2015 (12:46) | This comment has been automatically translated (show/hide original)

Field dish from the center to the edges
Not exactly ... the radius of curvature of the field is equal to twice the focal length of 60mm but on a field, in this case, is less than 1/100 mm.

no sign of coma
The coma is typical configuration Newton (entity inversely proportional to the ratio F / D) ... scan the film has bungled the image on the original, but you see very well on the edges the effect of the couple astigmatism + coma ... this was taken into account in the design phase preferring an opening less push and a greater footprint.

fall of light or other ....
Even this factor can be expected in the size of the pipe diameter and the secondary mirror. ;-)

avatarsenior
sent on March 07, 2015 (0:52) | This comment has been automatically translated (show/hide original)

Well you .... in fact the physical laws can not be deceived.
Years ago I dabbled even I in an effort to design and self-construction, but I never completed.
You say that the field is not exactly flat and that the coma is typical schema Newton .... but also speaks of "errors calculated" rather ridiculous. In fact, the picture looks perfect .... then maybe looking at the negative with a loupe you see something wrong. I've seen much worse things still made with instruments deemed to top.
I repeat that it seems a good tool. And so a photo made with something homemade is only to be admired ... even just for the design and construction capabilities.
Praise

avatarjunior
sent on March 07, 2015 (21:10) | This comment has been automatically translated (show/hide original)

... even just for the ability of design and construction.
I was born with a DNA researcher that "understand" the technology has become my reason for living ... I had even more ambitious projects but circumstances I were more favorable so I lacked the support to continue in the project.
A partial autobiography camera, just to see the individual: forum.foveon.it/index.php?topic=48.0

avatarsenior
sent on March 10, 2015 (0:28) | This comment has been automatically translated (show/hide original)

Wow .... life and interesting experiences.
When can I also like to use my head and hands together ... but I never achieved your results ..:-D:-D:-(




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