Lorenzo Comolli
I am pleased to announce that it has an online site dedicated to the wonderful pictures that Aldo took over Radrizzani between 1989 and 1998 with the Schmidt camera 600/400/300 and Tecnical Pan 2415 film (pictured above, a small part of a revival of M 31 in Andromeda). Aldo has unfortunately passed away in 2005, and has left a void in the community and amateur astronomers among his friends. But now you can see his work on this site , who wants to collect 921 negatives taken. There are online "only" 231 of them, and others will be added as the hard work of scanning and processing will be done.
Scan the negatives of Aldo was an arduous task, since it is negative, round 82 mm in diameter, with a high resolution (I tested that the grain is TP 3 micrometers and the smallest stars 10 micrometers). An image is scanned at 4800 dpi from 14000x14000 pixels (200 megapixel) in black and white, with dynamics of 16 bits, and employs over 400 MB. The only site I could get up to 50% versions, or 7000x7000 pixels. In order to process them easily but now I use a PC with i7 (4x2 processors) and 12 GB of RAM. But when work began in 2006, I had to make do with what that the technology of the time provided, and we really wanted to elaborate a lot of patience.
His work, despite having over 20 years, are still highly topical. An example is worth more than any other explanation. One evening I wanted to do a test / joke to a group of friends astrophotographers: I showed a series of shots taken with the Schmidt digital, h-alpha and CCD, put dozens of hours, and among them it took me a revival of Aldo made on film, cropped and processed properly. No one noticed it! Soon after I revealed the deception while it shows the same object taken with CCD and H-alpha. Certainly the second picture was better, but not so much as one might aspettare.
Potete leggere maggiori dettagli sulle pagine del sito .
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