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Sol 5-9-23 Detail
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Thanks for the comments and reply. I agree about the 22mm TeleVue Panoptic. It's def a special eyepiece in it's own right!
I will probably get another one down the road if I see a nice used one. Cheers to you as well Jack!
That said, I enjoyed your review of the type 4 naglers...
Thanks so kindly for your comments. All true as you said! I've read quite a few of your reviews as well and I thoroughly enjoyed the ones I did read! Clear Skies to you!
@Orion777I meant to say "Forum Posts", lol.
I never did “race” them, but shortly after I got the 13E, I had an opportunity to get my stock Orion mirror swapped for a 250mm f4.5” Zambuto, straight from the man. - also a topic for another day… but wow.
I would LOVE to still have my 12T4, but can easily see the Instajust and potential for Kidney beaning to be a huge issue for those viewing “naked” and floating.
"In your review you seem to be conflating Field Curvature with Coma, but they are two entirely separate Aberrations. I do not notice either Aberration in my F10 ACF SCT or my F8 APO with these eyepieces."
REPLY - (Taken right from my review):
"This was my first experience with field curvature when using the Type 4 Naglers. It was very strong and distracting. I did not have a coma corrector at the time, so I cannot comment on how the coma corrector would have eliminated the field curvature I was seeing. Younger eyes can accommodate the field curvature....older eyes have trouble focusing and is worse, so the 17mm T4 would be excellent for younger eyes or older eyes if you own a TeleVue Paracorr, or other type of coma corrector. "
22mm Nagler Type 4
"I owned this one for much longer than the 17mm T4. Some field curvature was present, but at the time I owned a 2 inch GSO coma corrector and it eliminated some of the field curvature I was seeing with this eyepiece, but over time it got to me and I also sold this as well. (I detest seeing field curvature in any eyepiece). Some of the FC still remained even with the GSO coma corrector, and it eventually was too bothersome."
In no way am I "conflating Field Curvature and Coma". I am well aware that coma comes from a Newtonian Mirror, (Mostly short FL mirrors). I know EXACTLY what coma looks like. It looks like little "comets" at the edges of eyepieces....mainly long FL eyepieces. I am also well aware about Field Curvature. Field Curvature CAN be focused out. When you re-focus an eyepiece, field curvature goes away when seen at the edges, but then you see it in the center of an EP. If you see FC in the center of an eyepiece, and focus it out, you will then see it at the edges. Coma CANNOT be re-focused and as I said in my review here, I mentioned a "coma corrector" which can eliminate coma. I did not say exactly what I am saying NOW and HERE, but if you read the review and pay attention....you will be able tom understand what I said. I also did say that the coma corrector did in fact ELIMINATE "some" of the FC seen in the 22mm Nagler...but not "all" of it, and I eventually sold it off.
I just read the review I did and it "does " say "field curvature" and I mentioned a "coma corrector" right after that...so in the initial review it does appear conflating. I should have worded it better.
Thanks for your comments! It does make sense what you said.