[EMP2012] Fwd: Black drop effect

[Jay Pasachoff]

A cell phone movie of June's transit of Venus.

It is the cover image of the December 2012 The Physics Teacher, which contains an article "Astrophotography on the Cheap" by Chuck Niederriter and Mario Belloni.

Jay Pasachoff



Begin forwarded message:

> From: "Belloni, Mario" <mabelloni at davidson.edu>
> Subject: RE: Black drop effect
> Date: December 4, 2012 9:10:14 AM PST
> To: Jay Pasachoff <Jay.M.Pasachoff at williams.edu>
> 
> Jay,
> 
> attached is that image. 
> 
> credits: Mario Belloni, Davidson College  / Emmy Belloni, Woodlawn School
> 
> Image taken with a Meade ETX 105 and a Scoptronix neutral density solar filter (that conveniently screws on). 
> I used an Orion iPhone adapter for afocal AP attached to a Meade eyepiece (I think it was a 24m), 
> and an (my mother-in-law's broken one after she got a replacement) iPhone 3 with a 2-megapixel camera. 
> Slight wavelet sharpening if I remember correctly. We were doing an outreach event and this camera was 
> clicked every so often throughout the 90 minutes, and we happened to get this one and it turned out.
> 
> My new iPod touch has a 5-megapixel camera that can also do movies and I am awaiting a new adapter to try it out. 
> I am curious how well afocal AP images processed in RegiStax from those movies will turn out as compared to 
> prime focus AP with Imaging Source video cameras.
> 
> mario
> 
> Mario Belloni
> Professor of Physics
> Davidson College
> P.O. Box 6910
> Davidson, NC 28035-6910
> 704-894-2320
> http://www.phy.davidson.edu/FacHome/mjb
> http://compadre.org/osp/
> 
> -----Original Message-----
> From: Jay Pasachoff [mailto:Jay.M.Pasachoff at williams.edu] 
> Sent: Monday, December 03, 2012 10:22 PM
> To: Belloni, Mario
> Subject: Black drop effect
> 
> Dear Emmy Belloni and Mario Belloni,
> 
> I admire your cover photo of second contact at the transit of Venus with a nice, extended, black drop effect, and your use of an iPhone.  May I have a copy of your photo and permission to use it in talks and perhaps eventually an article on the black drop effect?  I will also refer your article to colleagues who are planning a Megamovie with iPhones and the like for the 2017 solar eclipse.
> 
> With thanks,
> Jay Pasachoff
> Williams College
> 
> See my site at www.transitofvenus.info

______________________________
Jay M. Pasachoff
Field Memorial Professor of Astronomy
Director, Hopkins Observatory
Williams College
33 Lab Campus Drive
Williamstown, MA 01267-2565
413 597 2105; fax: 413 597 3200
jay.m.pasachoff at williams.edu

sabbatical through February 1, 2013
Caltech 150-21
Pasadena, CA 91125
jmp at caltech.edu
cell: 617 285 6351















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