Hello Solar firnds,
just received my Baader D-ERF from ventors and I am a bit confused on the direction to adopt in the cell, if I remember correctly, the "V" engraved on the Corrector of an SCT indicated the direction towards the primary, in this case what should the direction be, Sun Or telescope?
D-ERF right direction
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- Geremia Forino
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Re: D-ERF right direction
Hi Geremia,
See my review of the Baader DERF - the arrow points towards the sun.
Mark
https://brierleyhillsolar.blogspot.com/ ... eview.html
See my review of the Baader DERF - the arrow points towards the sun.
Mark
https://brierleyhillsolar.blogspot.com/ ... eview.html
http://brierleyhillsolar.blogspot.co.uk/
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Re: D-ERF right direction
On their webpage Baader says (unfortunately in German only) that the "V" is meant to be an arrow, and the arrow must point in the direction of the sun.
https://www.baader-planetarium.com/de/d ... filter.pdf
Frank
https://www.baader-planetarium.com/de/d ... filter.pdf
Frank
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Re: D-ERF right direction
Mark during a google search I saw this blog, I did not know it was yours, congratulations for the description.
as you can see you have a arrow, I have a "V" the confusion remained as I was referring to the optics of a SCT.
Thanks Frank to confirm the direction it points towards the Sun.
as you can see you have a arrow, I have a "V" the confusion remained as I was referring to the optics of a SCT.
Thanks Frank to confirm the direction it points towards the Sun.
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Re: D-ERF right direction
If ever in doubt, if you hold something like a screwdriver or pen over the filter, if you see an infinity reflection of the item, that is what faces the sun.
If you only see 2 or 3 faded reflections (or even just 1 reflection), that side faces the scope.
If you only see 2 or 3 faded reflections (or even just 1 reflection), that side faces the scope.
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Re: D-ERF right direction
If Simon has not been wrong, I am right, the "V" must point the telescope, just like in the SCT corrector.....I'm confused
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Re: D-ERF right direction
Ive always understood it as the multiple reflections should not be pointed at the sensor, otherwise when imaging, these reflections will be seen.
One side is a multilayer coating and the other is anti reflective.
I know this image is extremely confusing but hey, i could be wrong.
To be sure, go by what the instructions say. According to the PDF, the arrow points towards the sun.
One side is a multilayer coating and the other is anti reflective.
I know this image is extremely confusing but hey, i could be wrong.
To be sure, go by what the instructions say. According to the PDF, the arrow points towards the sun.
Geremia Forino wrote: ↑Tue Mar 29, 2022 10:15 pm If Simon has not been wrong, I am right, the "V" must point the telescope, just like in the SCT corrector.....I'm confused
single reflection.jpg
multiple reflection.jpg
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Re: D-ERF right direction
I just triple checked with an ERF that's already mounted, the arrow pointing TOWARDS the sun meaning that the multi reflection faces the scope (or camera). Im assuming a D-ERF is treated as narrowband filter which makes sense since its only allowing 600-700nm.
I was wrong. The mentioned is true for LRGB.
I was wrong. The mentioned is true for LRGB.
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