Gerard M. Foley

Travel & Photography Collection

Moon, July 2000 - Comparison of Barlow Lens

I think the images below show that the built in Barlow lens in the Questar is of little benefit with the Olympus C2020Z.

Without Barlow on left, resized to compare with image with Barlow.
Without Barlow on left, resized to compare with image with Barlow.
With Barlow
With Barlow
About 9:13PM EDT July 7, 2000 Images without Barlow pasted with Pixmaker Lite
About 9:13PM EDT July 7, 2000 Images without Barlow pasted with Pixmaker Lite
Moon, about 5:13AM EDT July 24, 2000 Images without Barlow pasted with Pixmaker Lite
Moon, about 5:13AM EDT July 24, 2000 Images without Barlow pasted with Pixmaker Lite

The Olympus C2020Z allows complete manual control of exposure, aperture and focusing. The images above were all made with manual control of exposure time.

When manual focusing is selected, the image on the LCD screen is magnified to help in adjusting the focus. The leftmost image below was made with the C2020Z in its manual focus mode, the focusing being done by moving the mirror of the Questar telescope to obtain the sharpest image according to my eye. The image on the right resulted from leaving the telescope focus undisturbed and the autofocus of the Olympus camera turned on.

C2020Z in manual focus mode
C2020Z in manual focus mode
C2020Z in autofocus mode
C2020Z in autofocus mode
July 11, 2000 about 10PM EDT Composite of Three images through Questar, no Barlow, Olympus C2020Z Manually assembled in Picture Window. My favorite stitchers, PixMaker Lite and Photovista would not handle this.
July 11, 2000 about 10PM EDT.

Composite of three images through Questar, no Barlow, Olympus C2020Z manually assembled in Picture Window. My favorite stitchers, PixMaker Lite and Photovista would not handle this.

Region of Rupes Montes - the Straight Wall from same session of cloud dodging.
Region of Rupes Montes - the Straight Wall from same session of cloud dodging.