Some little birdies through a little telescope

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sunjester Senior Member • Posts: 1,045
Some little birdies through a little telescope
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Used a William Optics gt 71 sometimes with and sometimes without a focal reducer (don't remember which is which). It's a 420mm f5.9 at prime focus, I would have to measure and calculate for the focal reducer since it changes with the distance from the lens to the focal plane of the camera. Probably more like f4.6 perhaps a bit faster.

Quite a bit of work aiming the scope and getting the focus right on these energetic little birds.

The telescope is a triplet APO with fpl53 glass, I got it slightly used for about 400US. I also use this telescope for astronomy but am just learning so not photographing stars yet.

Female Chestnut-sided Warbler

Male Black-throated Blue

Blue-winged Warbler

Another Black-throated Blue

Juvenile Dark-eyed Junco

Juvenile Rose-breasted Grosbeak.

Yellow Warbler

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Equivalence is a fascinating explanation why 10% oxygen is the same as 21% oxygen if only you lived on Proxima Centauri b.

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