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  1. #6161
    Senior Member
    Dawg Pics's Avatar

    Re: Post your latest purchases.

    @Peter7100
    I have seen, many times, an orange/red moon at horizon. It gets lighter as it rises. Prettiest moon I have seen was a full moon rising over Lake Pontchartrain near New Orleans. We were driving over the causeway and watched it go from dark red to red orange to dark orange, to golden and it eventually went pale yellow and then white.

    It is caused by light scatter from the atmosphere.


    › See More: Post your latest purchases.
    Thanks/Like blackstar Thanks/liked this post
     
    "Connected to the universe by way of the star-stuff within"


    Um yeahhhh, I shoot a lot of pics of my dogs.
    D500 (DOB 05/26/17), D300, D80, SB-800. RIP-D100
    Sigma 300mm f2.8, Sigma 150-600mm DG Contemporary, Sigma 50-150mm f2.8
    Tamron 28-75mm f2.8
    Nikkor Nifty-Fifty
    Tokina 11-20mm f2.8
    Bogen tripod with a missing screw and Bogen pistol grip that is eternally stuck on it.
    Manfrotto tripod with 3-axis Bogen head that is rusted stiff and drifts. About to be replaced.



  2. #6162
    Senior Member
    Patrick Molloy's Avatar

    Re: Post your latest purchases.

    A set of Kase Wolverine Magnetic filters for the z 14-24 f2.8

    The lens hood is threaded for 112mm filters, and this hood also work with the other two f2.8 lenses in the trinity. Post your latest purchases.-screenshot-2021-08-29-15.12.12.jpg
    Thanks/Like Dawg Pics, Peter7100 Thanks/liked this post
     
    ---
    ​Patrick
    Nikon Z 6
    Nikkor z 14-24mm F2.8 S
    Nikkor z 24-70mm F4 S
    Nikkor z 70-200mm F2.8 S
    Nikkor TC-2



  3. #6163
    Staff
    Super Mod
    hark's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by Peter7100 View Post
    I had wondered about the colour as 30 mins later when I tried again the orange/red tone had gone and it was just a normal looking moon. I certainly didnít do any pp on it to affect it. I therefore assumed it was light pollution or something else in the atmosphere?


    Sent from my iPhone using Tapatalk
    I'm on the east side of the USA. There were a few evenings when the moon was a golden color due to the fires out west. Perhaps yours was due to something similar.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  4. #6164
    Senior Member
    Peter7100's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by hark View Post
    I'm on the east side of the USA. There were a few evenings when the moon was a golden color due to the fires out west. Perhaps yours was due to something similar.
    One fortunate thing about living in Scotland is that it is never warm enough to start random fires from here.
    Also when I photographed the moon it was at 80 deg so mainly east, which would be looking in the opposite direction from the US.
    I’m still thinking light pollution as it is really bad where I am, although it could equally have been something else in the atmosphere.
    Peter

    D500
    D7100
    Tokina 11-16 f2.8
    Nikon 85mm 1.8G
    Nikon 300mm F4 AF-S
    Sigma 150-600c
    Lee filters
    My Flickr account - https://www.flickr.com/people/peter-young/

  5. #6165
    Senior Member
    Dawg Pics's Avatar

    Re: Post your latest purchases.

    @hark Rayleigh scattering of light through the atmosphere causes the red color. The sky is blue for the same reason. There is more atmosphere for the light to pass through from horizon, so the moon looks redder and then gets lighter as it gets higher up. If you can catch a rising orange/red moon, it is pretty spectacular and pretty cool to watch it change color. I can't explain the physics of it all, something about particles, wavelenghts, etc, etc.
    Last edited by Dawg Pics; 08-30-2021 at 03:16 AM.
    Thanks/Like hark, Peter7100 Thanks/liked this post
     
    "Connected to the universe by way of the star-stuff within"


    Um yeahhhh, I shoot a lot of pics of my dogs.
    D500 (DOB 05/26/17), D300, D80, SB-800. RIP-D100
    Sigma 300mm f2.8, Sigma 150-600mm DG Contemporary, Sigma 50-150mm f2.8
    Tamron 28-75mm f2.8
    Nikkor Nifty-Fifty
    Tokina 11-20mm f2.8
    Bogen tripod with a missing screw and Bogen pistol grip that is eternally stuck on it.
    Manfrotto tripod with 3-axis Bogen head that is rusted stiff and drifts. About to be replaced.

  6. #6166
    Staff
    Super Mod
    hark's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by Dawg Pics View Post
    @hark Rayleigh scattering of light through the atmosphere causes the red color. The sky is blue for the same reason. There is more atmosphere for the light to pass through from horizon, so the moon looks redder and then gets lighter as it gets higher up. If you can catch a rising orange/red moon, it is pretty spectacular and pretty cool to watch it change color. I can't explain the physics of it all, something about particles, wavelenghts, etc, etc.
    Thanks for the explanation! I had no idea.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  7. #6167
    Senior Member
    Bikerbrent's Avatar

    Re: Post your latest purchases.

    Gee @Dawg Pics, I think we found the next Carl Sagan!
    Last edited by Bikerbrent; 08-31-2021 at 03:51 AM.
    Brent: Poway, CA
    D7200, D200, F100
    Tokina 12-24mm
    Nikon 18-200mm
    Tokina 28-70mm f2.6-2.8
    Nikon 80-200mm f2.8
    Sigma 150-600mm
    Nikon 50 AF f1.8
    Tokina 100mm f2.8 Macro
    Nikon SB800

  8. #6168
    Senior Member
    Peter7100's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by Bikerbrent View Post
    Gee, I think we found the next Carl Sagan!
    That would be a great addition to have to the forum , particulary as @Dawgpics reply has got me thinking about something and I can't find a way to calculate the following:

    If you take any point in the World, lets say San Francisco and you were able to extend say a ruler straight above you, how high would it have to go before someone, lets say in New York to was able to view it (assuming they could see that far). Obviously the curvature of the Earth x the distance between the two points will determine the answer. Anyone know if there is such a calculation as I assume one must exist somewhere
    I'm sure the following is probably involved in part of the calculation, where the average 6ft person can see approximately 3 miles to the end of the horizon and if you are say 1 mile up a mountain you could then see out to approximately 350 miles out to the horizon line.
    This is @hark 's fault as she got me thinking when she mentioned fires out west affecting colours
    Thanks/Like hark Thanks/liked this post
     
    Peter

    D500
    D7100
    Tokina 11-16 f2.8
    Nikon 85mm 1.8G
    Nikon 300mm F4 AF-S
    Sigma 150-600c
    Lee filters
    My Flickr account - https://www.flickr.com/people/peter-young/

  9. #6169
    Senior Member
    Dawg Pics's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by Bikerbrent View Post
    Gee, I think we found the next Carl Sagan!
    Hardly. I barely passed high school physics. When you start talking in detail about things like "Rayleigh scattering", "Root Mean Square" and "Nyquist Frequency." I bow-out of the conversation. Other than I know that light scatters into different colors. Any other information, and I would refer you to articles about it.

    Astronomy is my other hobby (kinda). Haven't used my scope much in a long time, but starting to get back into it.
    "Connected to the universe by way of the star-stuff within"


    Um yeahhhh, I shoot a lot of pics of my dogs.
    D500 (DOB 05/26/17), D300, D80, SB-800. RIP-D100
    Sigma 300mm f2.8, Sigma 150-600mm DG Contemporary, Sigma 50-150mm f2.8
    Tamron 28-75mm f2.8
    Nikkor Nifty-Fifty
    Tokina 11-20mm f2.8
    Bogen tripod with a missing screw and Bogen pistol grip that is eternally stuck on it.
    Manfrotto tripod with 3-axis Bogen head that is rusted stiff and drifts. About to be replaced.

  10. #6170
    Senior Member
    Dawg Pics's Avatar

    Re: Post your latest purchases.

    Quote Originally Posted by Peter7100 View Post
    That would be a great addition to have to the forum , particulary as @Dawgpics reply has got me thinking about something and I can't find a way to calculate the following:

    If you take any point in the World, lets say San Francisco and you were able to extend say a ruler straight above you, how high would it have to go before someone, lets say in New York to was able to view it (assuming they could see that far). Obviously the curvature of the Earth x the distance between the two points will determine the answer. Anyone know if there is such a calculation as I assume one must exist somewhere
    I'm sure the following is probably involved in part of the calculation, where the average 6ft person can see approximately 3 miles to the end of the horizon and if you are say 1 mile up a mountain you could then see out to approximately 350 miles out to the horizon line.
    This is @hark 's fault as she got me thinking when she mentioned fires out west affecting colours
    I just heard an explanation regarding weather radar for windspeed. The meteorologist was explaining why the values in the periphery would be off due to the curvature. You get upper air currents not ground currents farther away, and it wasn't all that far. You might want to start another off-topic thread for science stuff.
    Last edited by Dawg Pics; 08-30-2021 at 08:12 PM. Reason: Edited out Ham Radio. Been too long was thinking about something else.
    Thanks/Like Peter7100 Thanks/liked this post
     
    "Connected to the universe by way of the star-stuff within"


    Um yeahhhh, I shoot a lot of pics of my dogs.
    D500 (DOB 05/26/17), D300, D80, SB-800. RIP-D100
    Sigma 300mm f2.8, Sigma 150-600mm DG Contemporary, Sigma 50-150mm f2.8
    Tamron 28-75mm f2.8
    Nikkor Nifty-Fifty
    Tokina 11-20mm f2.8
    Bogen tripod with a missing screw and Bogen pistol grip that is eternally stuck on it.
    Manfrotto tripod with 3-axis Bogen head that is rusted stiff and drifts. About to be replaced.





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