Explore Scientific 82 24mm vs. 30mm
Posted 20 January 2013 - 08:45 PM
Now that I've had a chance to observe with my ES 82 24mm I'm curious as to what I missed by not going with the 30mm. Originally I was looking at both of these EPs before purchasing the 24mm last week.
After trying the 24mm I think I prefer the heavier 2" EPs on my XT8 rather than the lighter 1.25" ones; the scope just seems to move better and doesn't require a counterweight as others have mentioned in their posts. Ultimately I'd like to end up with 3-4 ES 82 EPs or maybe even a 100 somewhere in the mix.
Another poster (I believe his name was Jim) was talking about just needing 3 total EPs and that seems pretty realistic for my needs. At the low power end I could see having either the 30mm or the 24mm, an 11mm (which most posters seems to rave about) and then perhaps a 4.7mm for high power.
I like seeing the complete Orion nebula with the 24mm and I would imagine that Andromeda would frame nicely in this EP as well. Hopefully I will get a chance to vet this out in the next week or so.
So does anyone have both the 24mm and 30mm ES 82 EPs that could comment on the differences and whether or not they think I would be better off exchanging the 24mm for the 30mm or was the 24mm a good choice to begin with? Even though I'm on an acre in a neighborhood without streetlights, I have a couple of neighbors that insist on putting on their outside lights at night which can be a bummer and my thinking was that the 24mm would capture less light pollution. Any thoughts or comments would be greatly appreciated.
Posted 20 January 2013 - 09:32 PM
Posted 20 January 2013 - 09:46 PM
Posted 21 January 2013 - 12:59 AM
They're both great eyepieces. The 30 does get a tad heavy and balancing can be an issue. During more light polluted viewing the 24 gives a darker background.
I just sold my 24 because I went with a ES 20mm 100; otherwise, I would have kept both eyepieces.
Posted 21 January 2013 - 08:31 AM
Posted 21 January 2013 - 10:09 AM
Pentax XW 5mm, 7mm, 10mm, 14mm,
ES 82 degree: 24mm and 30mm
ES 68 degree: 20mm
I just got the 24 so I haven't used it in my 10 inch dob or in the 14 inch dob. I have used the 30mm in both and yes, it requires a counterweight. On the 14 inch dob that is a simple 2.5 lb ankle weight attached to the bottom of on of my front struts. No biggie. and I can leave it on to help balance out other items as the scope likes it there since I use a Paracorr Type I (sometimes I add a second weight, sometimes I don't). On my XT10 dob I have a Harbor Freight welder's magnet that I use as a counter weight and that works great on the back end of the tube.
The 30mm frames all my large objects well, and for me it is a speciality eyepiece when I want to see big objects like M42, or the Veil in summer, the Double Cluster, M31 and friends, or a triage of spring galaxies that will soon be in the early night sky in one field of view. My 27mm Panoptic has been my go to finder eyepiece as I love the size, the weight and the FOV when in my Type I Paracorr. The 24mm was an impulse buy to compare the 30mm to it and to see if its wider FOV is preferable to my 27mm Panoptic as a finder eyepiece. I can't sell the 27mm Panoptic as my daughter bought it for me as a gift and it has sentimental value, and I got it for $270 in the day, but it should make for an interesting comparison. The 24mm ES 82 degree gives me 69x with a 1.19 degree FOV. The 27mm Pan. gives me 61x with a 1.11 degree FOV. We'll see which I use more of.
I also use the 20mm ES 68 degree as a finder depending on where I am at and what I am doing and if I want to keept the 1 1/4 inch adapter in. My goal is to take off my 9x50 finder and just use eyepieces to view since I do that about 80% of the time anyway. Taking off the finder scope I find does more for resolving balance issues with the ES 30mmand 24mm than anything. In the end, all I want on my scope is my Telrad, my eyepiece and Paracorr.
Posted 21 January 2013 - 12:46 PM
Posted 21 January 2013 - 06:13 PM
...Both of these eyepieces are nice hunks of glass....If your scope has the teflon bearings, balance won't be a problem, if you have the spring system, you may need some counterweights.
...but at the same time, especially when using 30mm, you don't need finder anymore so balance is retained
Posted 21 January 2013 - 09:50 PM
Posted 22 January 2013 - 08:56 AM
Posted 24 January 2013 - 12:25 AM
If you ever binoview you would like 24mm 68mm 1.25" panoptic.