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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Scarlet-W OLPF Red Spots

David R

David R

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Hi Guys

Just got my new Scarlet-W... finally, loving it. I ordered the Low Light OLPF as it seemed the best option in some ways and also I do a lot of low light shooting every now and then. Was doing some tests the other day and I noticed a series of red dots appearing on the image when pointed at a bright source. Did a bit of research and if I'm correct this was an issue with the earlier Dragon OLPF's but had since been fixed? Saw a thread in which Phil Holland had mentioned it had been pretty much solved in the newer Dragon OLPF's bit confused why I would be seeing it on the latest Weapon OLPF's! Here's some screen grabs below pointing at the sun through some leaves.

Have I got a defective OLPF or are other people encountering this? I'm looking at maybe getting the Standard OLPF as well just want to make sure I'm not going to have the same problem :(

ayrlnk.jpg


da14i.jpg



Cheers;


David R
 
Also before someone brings it up I would like to point out this image from Phil's post where he is shooting at F16 directly into the sun with the Old OLPF and the new one and you can see the pattern but not in the new OLPF. So its definitely not a problem with the lens being stopped down as I was F16 on a 50mm.

phfx_redDragon_NewOLPF_FlareSun.jpg
 
You probably shot this without ND's, stopping the lens down almost all the way. When you do this, almost everything is in focus, including these red dots. Throw in some ND, Open up your iris and the problem is gone...
 
David R said:
correct
Click to expand...

Incorrect.

This is an known artifact that occurs when lenses are stopped down (often beyond T4) and the camera is pointed at a very hot and pointy source, like the sun.

This occurs the strongest with the Low Light Optimized OLPF and is slightly lessened with the Standard OLPF.

The Skin Tone - Highlight OLPF produces the best image in this particular type of shot as it protects from this artifact the most due to the filter's properties.
 
David R said:
Also before someone brings it up I would like to point out this image from Phil's post where he is shooting at F16 directly into the sun with the Old OLPF and the new one and you can see the pattern but not in the new OLPF. So its definitely not a problem with the lens being stopped down as I was F16 on a 50mm.

phfx_redDragon_NewOLPF_FlareSun.jpg
Click to expand...

This image, though at the time it didn't have a name, shows the "NEW DRAGON OLPF" which is what we now know as the Skin Tone - Highlight OLPF.
 
Phil Holland said:
This image, though at the time it didn't have a name, shows the "NEW DRAGON OLPF" which is what we now know as the Skin Tone - Highlight OLPF.
Click to expand...


Thanks for clearing that up Phil! Good to know its not as noticeable on the Skin Tone OLPF. Looks like I'm going to have to grab the Skin Tone OLPF as well. Wish someone would make a variable Optical Low Pass Filter ;)
 
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