William Optics 2 Inch Diagonal

[djpaul]

Hi

Ive been on the look out for a secondhand 2 inch diagonal to use with my William Optics zenithstar scope.

I have been offered one for £80 in very nice condition including 1.25 adaptor.

The marking on the diagonal says Dielectric but some other William Optic 2 inch models i am finding on google say Dura-Bright.

Is there a difference ?

If so which of the 2 is better quality build wise and price wise?

Any help would be great before i decide to buy

Paul

[Pig]

Paul, there is a short thread on this very subject below ?

https://www.cloudynights.com/topic/434632-william-optics-2-dielectric-vs-dura-bright/

From other descriptions it appears a tad confusing, the way I read the various descriptions it seems the dura-bright is also dielectric. Maybe there is an earlier version that was simply dielectric and now dura-bright coatings have been added to improve it !!

[djpaul]

Hi Mate

Thanks for the advise. Does £80 sound a fair price for one in good almost new condition?

You may remember im also in northampton

Hoping the skies clear tonight.

Are you going to the PAS?

We could meet up if you are

Paul

[djpaul]

Im just checking the Field stop of my eyepieces as its seems the Dielectric version can have issues if the field stop is near 45mm

Paul

[John]

The WO diagonals and their clones do use rather thick rings to hold the eyepiece barrel onto the body of the diagonal. With the 1.25" size this ring does reduce the aperture noticably so eyepieces with the widest field stops for that barrel size are vignetted. It's possible that the same goes for the 2" units as well. Otherwise they are very nice diagonals. 

 

[Pig]

25 minutes ago, djpaul said:

Hi Mate

Thanks for the advise. Does £80 sound a fair price for one in good almost new condition?

You may remember im also in northampton

Hoping the skies clear tonight.

Are you going to the PAS?

We could meet up if you are

Paul

I am not sure what they cost new, but 60-70% of new is common. I haven’t forgot you live in Northampton ? I have my scope set up in the garden but it’s still thick cloud outside, fingers crossed the forecast is accurate ?

I am going to the PAS and we can meet up, we can arrange it nearer the time ?

 

[djpaul]

yes im just waiting for clouds to clear too.

not put scope out yet but hoping to get some good views of the bee hive tonight

As for a new diagonal im thinking maybe leave it for now 

Id like another everbrite but they dont come up too often in perfect condition 

[djpaul]

okay scope went out about 9pm.

skies clearing so just viewing the bee hive cluster .

Fits nicely in my nager 26mm with the 120ed

[Pig]

It’s not as cold as I expected ..... some nice long breaks between the clouds and it seems to be improving ?

[djpaul]

Yes i think its supposed to get better around midnight. 

My first decent view of the bee hive

Sharp and clear edge to edge of FOV. ?

[Pig]

I have been comparing my high powers eyepieces on Almach, it’s quite interesting how they all differ but all are excellent ? OK back out I go 

[John]

There is a nice cluster below the Beehive - M67. Smaller, fainter and one of the oldest clusters known. It's near the star Acubens (Alpha Cancri).

[djpaul]

Cheers john .... i may look for that later tonight .... at the moment im still struck on the bee hive.

[djpaul]

It did cloud over but clear again now .

I will have a go at finding M67 in a while John..