Tag Archives: moon

Super Blood Wolf Moon — 20 January 2019

“Super” because the moon is close. “Blood” because of the eclipse. “Wolf” just because the January full moon is called a wolf moon. Some icy clouds so I wasn’t too optimistic but it turned out OK. The clock on my camera was about 20 minutes fast so the image time stamps are a little off. Images are shrunk to 1024 on the long side. Most with the Canon 60D & Sigma 18-250mm.

Moonrise over the Sangre de Cristos.

Moonrise over the Sangre de Cristos.


Icy clouds are beautiful but not great for astrophotography.

Icy clouds are beautiful but not great for astrophotography.


No eclipse yet but the clouds cleared for a while.

No eclipse yet but the clouds cleared for a while.


Near the beginning of the eclipse.

Near the beginning of the eclipse.


Here’s a good example of “crop factor” based on sensor size.The above image was taken with a Canon 60D, which has an APS-C sensor, and a 250mm lens. Because the sensor is smaller than a frame of 35mm film (“full frame”), the angle of view is narrower. For Canon APS-C, the factor is 1.6. You don’t magically get a longer zoom but the field of view is equivalent to the length of the lens times the crop factor. In this case, 250mm X 1.6 = 400mm.

Sony A7 (full frame) and an old Canon FD mount Kiron 400mm telephoto.

Sony A7 (full frame) and an old Canon FD mount Kiron 400mm telephoto.


Both images were resized to 1024 but no cropping. The size of the moon is the same for full frame at 400mm and an APS-C sensor at 250mm.

Back to the moon…

Nearing totality.

Nearing totality.


I switched from aperture priority to manual.  The moon sliver is too small for the spot meter in the camera.

I switched from aperture priority to manual. The moon sliver is too small for the spot meter in the camera.


Still exposing for the sliver so the moon isn't a white blob.

Still exposing for the sliver so the moon isn’t a white blob.


Going... This is a full second at ISO 400 & f/6.3 (as wide as the lens goes at 250mm).

Going… This is a full second at ISO 400 & f/6.3 (as wide as the lens goes at 250mm).


Going... This is about a minute later. They kinda look the same but I was stoked about how they were coming out.

Going… This is about a minute later. They kinda look the same but I was stoked about how they were coming out.


Still going...

Still going…


Houston, we have totality!

Houston, we have totality!


I tried a Canon 2X teleconverter with the Kiron lens on the Sony for a total of 800mm.
800mm

800mm


I even tried a Kiron 2x converter stacked with the Canon 2X converter and the 400mm lens. It worked but the loss of light from the converters, the not-quite-perfect alignment of the converters+lens, and wobbliness of trying to aim something that long on a small tripod (while freezing) wasn’t worth it. The black spot is dust I got on the sensor while dorking around with converters with numb hands. You can see green chromatic aberration at the top of the moon.
2X + 2X + 400mm = 1600mm of wobbly goodness.

2X + 2X + 400mm = 1600mm of wobbly goodness.