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Uploaded 18-Jun-10
Taken 18-Jun-10
Visitors 168

3 of 13 photos
Photo Info

Dimensions1200 x 800
Original file size411 KB
Image typeJPEG
Color spacesRGB
Date taken18-Jun-10 15:44
Date modified18-Jun-10 16:54
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS REBEL T2i
Focal length0 mm
Exposure1/8 at f/1
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 800
Metering modePattern
Sun in Ha - a large, detatched prominence

Sun in Ha - a large, detatched prominence

Date: June 18, 2010 3:44pm PDT

Location: Victoria, BC, Canada

What originally caught my attention this afternoon when I looked through the eyepiece was a large, mountain-shaped prominence with another smaller prominence under it and another large prominence which reminded me of a haystack. This spectacular prominence eluded me while observing through the eyepiece since was completely separated from the solar surface. It was only revealed to me when I processed my images. This image is processed using a Sobel method of edge detection, which results in a false colour image.

Exposure: 1/8 second at ISO 800
Bandpass: <0.55 A

Equipment: Hutech-modified Canon T2i dSLR a-focal through a 2.5x Powermate, IDAS VLC filter, & Lunt LS60THa + LS50FHa solar telescope mounted on an HEQ5 tracking mount.

Processing: ACDSee Pro 3 - Sobel edge detection; modest contrast stretch, crop.