Great! --> I have a question.

Where I live in Canada it's not impossible for me to use these in temperatures from -10 to -20 Celcius during winter. I would be glad to know if they can tolerate these cold temperature without causing any damages to them.

My primary concern is the integrity of the seals retaining the gas inside the EP, against thermal expansion. Normally I would read the tolerances inside the spec sheet and follow them, but there is nothing in the the spec sheets about extreme cold.

I have the 34mm 68d and the 4.7mm 82d

Thanks.

 

I hear they explode in Canada lol.

 

hehehehe Beboom! Like a hand grenade the 34mm.

--> But it's not funny Mak, it's like buying a car without a temperature gauge and guessing the motor heat based on absolutely nothing. It's unfair for the customer.

 

What I dislike about a lot of ES eyepieces is the exaggerated drawtube taper, as it can deform compression rings. They do look like nice EP's though.

According to their site, they invite emailing them.

Email: service@explorescientific.com

 

@Mak the Night, I think that's a great feedback, the drawtube exaggerated taper situation, if it can deform the compression rings ES should consider it...

I already tried Service@explorescientific.com but there was nobody at the end of the line. I tried to write to Jeff@explorescientific.com, but, he will not reply either.. Perhaps I should try the good old telephone...

Either way I would be nice to know the technical specifications required for my cold weather in Canada. I paid close to 6 bills for the 34mm and the 4.7mm... I want to feel like a proud owner but instead I feel unconsidered...

 

I've heard that the 2" drawtubes are more likely to deform compression rings than the 1.25". I believe ES compression rings are steel and deliberately made with this in mind. You can get away with a slight taper with 1.25" EP's but 2" needs more pressure to secure them.

 

Hello Agena, I thank you for your attention, that's very nice of you. I already feel better honestly. -300f is quite cold, that's -184.4 Celcius.

So I can assume they can withstand -20 celcius for many hours without problems or any gas loss?

Thanks

 

I went a bit Barnsley Hall and ordered a 14mm ES.

 

Yes? your first ES, great Mak!! I think they are beautiful eyepieces. Which 14mm did you bought ? 62d, 82d or 100d ?

 

This one:



It's for the ST80 in 1.25" mode. At about 250 grammes it is 100 grammes lighter than the 15mm Luminos and isn't far off the weight of the 24mm Panoptic, which I can easily handle on the AZ5. It will give 28.5x for 2°, 52‘, 12“ TFOV with a 2.8mm exit pupil.

 

Wow that's a beautiful eyepiece congratulations. 28.5x degrees is a really nice power for star fields with 2 degrees TFOV. Another nice piece to your collection along the beautiful 24mm and 19mm Panoptic (and others)

82 degrees, this is a serious eyepiece, very good looking too. I just used mine, my 4.7mm 82d about 1 hours ago to look at the moon, I am impressed every time I use it. If the 14mm is has good has the 4.7mm it's going to be awesome.

 

I'll see when it arrives. It certainly looks good. Decent price as well. The TFOV is nearer to 3°; nearly 6 Full Moons.

 

I think you will like it has much has I like my 2 explore scientific eyepieces. It's going to be incredible with 82 degrees.

 

It should be delivered tomorrow. I'm quite excited in a way lol.

 

Yep it's not like receiving a trio of plastic Svbony. The 14mm will be more like a piece of jewelry in a very nice box. Then you take it, it's heavy and well finished like the Televues. Each time I look at them it makes me happy... nonetheless.

 

Oh My, I might receive a gift too from Agena, My 8 GSO color filters for planetary usage has we discussed previously. I need to prepare my new little flat box to fit them all inside.

December 27, 2017, 9:02 am
Departed
MONTREAL, CANADA
Your item departed a transfer airport in DORVAL, MONTREAL, CANADA on December 27, 2017 at 9:02 am. The item is currently in transit to the destination.

I still hope this was not a total waste of money..

 

Hopefully it won't be much heavier than my 24mm Panoptic.

 

Coloured filters rock!