bilbo

Still waiting for some "official" answers, so to speculate here would be inappropriate. (For now)

Steve

PS Lovely Cover Pic,  Lost our dog in Oct,  Still killing me

This is just really about a date range for when we saw a change in the IR cut (front) filter.  There's nothing wrong with It, but it may or may not help me and speculation is pointless.

Thanks to everyone for the replies, Its looks like it'll be some time before I get to the bottom of my real question. I'll let you know how it pans out

Steve

No concerns about safety whatsoever,

7 hours ago, symmetal said:

If you see the light in the reflection it looks more white but if you shine the light at an angle and view it such that the light source isn't directly visible in the reflection it then appears as green. I assumed that's what bilbo wanted, but with his image showing the light itself shown in the reflection, I think I've got it wrong and would have to say it's more white than green. Sorry bilbo. (S/N 0001005)

Alan  

Yes, correct, the important thing I'm looking for is the colour of the mirrored reflection of the lamp and not the colour of the glass. I tried four white light led sources with different colour temperatures, 2 were cool white, (very white), 1 Warm (Like the old tungsten bulb) and 1 inbetween. They all produce a distinctively green reflection of the source in the 2013 B600 and a White reflection in the 2017 B600 S/N 0000.

At the moment I'm just trying to gauge if and when there was a change in these filters and if it points to a more concerning issue.  I'll probably have to ask the question again with greater clarity. My next post will explain why

Steve

Meant to add both blocking filters in pics I posted  have crystal clear filters, I'm trying to discover if there any correlation between the reflection and another problem which is why catching the reflected "bulb" itself is important

1 hour ago, jam1e1 said:

hi white

b1200 2015

Whilst on this topic noticed this strange mist type cover - any suggestions on what this is - i wouldnt have noticed if didnt do this! J

Hi

Filters starting to deteriorate, known problem and apparently free fix from lunt see

https://stargazerslounge.com/topic/316776-lunt-blocking-filter-check-yours-you-wont-regret-it/?tab=comments#comment-3464489

PS try catching the refrection of the actual lamp, I used an led tube lamp for the first pics, and a power tank torch for the second.

cheers

Steve

45 minutes ago, Piero said:

I am not an expert of this, but I thought that that filter is the ITF not the blocking filter. I thought the blocking filter is the red one on the eyepiece side.

Can someone give more detail, please?

Hi  Piero,

Q is just simply about the colour, I'm looking for variations

Wonderful. Thank you, I’m hoping I’ve nailed this. I’ll give it till Monday, the more replies the merrier and the end result could be of use to everyone.

cheers

Thanks ED

 Would've expected green if my idea is correct, but it still could be.  The more responses I get the easier it becomes to work it all out

cheers

Thank you, , I don't think the actual model matters, I kept the post short to avoid unnecessary replies, But I will explain all

Steve

Thank you ever so much. another dozen results and I'll be happy and hopefully one step closer.

Steve

Hi Guys

I have an issue with light transmission through a B600 filter

If you own one of these or B400 B1200 could you help with a little experiment, Shine a White light (I used LED) at an angle onto the large scopeside filter so that you can see the reflection and tell me whether the reflected light source  (lamp not glass colour) is white or green.  If you can let me know the scope year (first four digits of S/N or OOOO for late models it would be a great help in narrowing down the issue.

I'll elaborate more later

cheers

Steve