36 replies to this topic

[Starman1]

Well.... I'm trying to assimilate all that, lol. Thanks for responding again - I was getting ready to order the Astrosystems adapter in a few minutes. Just to be clear, this is what I need?

 

https://agenaastro.c...SUaAsRvEALw_wcB

 

There seems to be a possible issue with the thumbscrew on the Baader unit preventing it from fully seating? Unless the Paracorr 1 has a slot that would accommodate it? I probably won't have the Paracorr 1 on-hand until mid-week but can get the adapter ordered in the mean time.

The Push fix includes a setscrew to replace the thumb screw so it can seat completely.

You adjust the setscrew so the eyepiece can be rotated in and rotated out without much drag yet still fit tightly enough to stay in place.

It takes a few seconds of tinkering.

[Starman1]

My two cents:

 

2.5 mm is a single step in the Paracorr setting.

 

At F/3.5 the exact setting is critical. At F/5, everything is more relaxed. You will be able to focus, the setting may not be optimal but the views will still be very good. 

 

Back in the days before the Paracorr 2, people used the Paracorr 1 with the 31 mm Nagler, it also takes setting A on the Paracorr 2. I was using it in my 12.5 inch F/4.06, 16 inch F/4.4 and 10 inch F/5. No one complained .

 

Jon

This is true, but since he has parfocalized all the eyepieces to the 17.5mm, it would mean ALL of his eyepieces would be a bit off the optimum setting.

It's not critical, as you mention, but when a simple change of adapter is all that's required, it's an easy fix.

[Jon Isaacs]

This is true, but since he has parfocalized all the eyepieces to the 17.5mm, it would mean ALL of his eyepieces would be a bit off the optimum setting.

It's not critical, as you mention, but when a simple change of adapter is all that's required, it's an easy fix.

 

My solution is to use the standard adapter and accept that the 17.5mm is not quite optimally spaced.  In my scopes with my eyes with the Paracorr 2, I just don't see the coma.

 

Jon 

[Neanderthal]

This is true, but since he has parfocalized all the eyepieces to the 17.5mm, it would mean ALL of his eyepieces would be a bit off the optimum setting.

It's not critical, as you mention, but when a simple change of adapter is all that's required, it's an easy fix.

 

 

My solution is to use the standard adapter and accept that the 17.5mm is not quite optimally spaced.  In my scopes with my eyes with the Paracorr 2, I just don't see the coma.

 

Jon 

 

The current plan is to give both the standard and Push-fit adapters a try. What I'm not going to do is have two different adapters to mess with. I only have 5 eyepieces, and 4 of them (Morph's) are also used in two other scopes. Looking forward to comparing to the GSO coma corrector.

[25585]

I have two 17.5s, so will put a push-to on one of them, & it will join my Dob kit.

[triplemon]

I've always wondered why Baader just didn't revise all the other EP's and add that 2.5mm to the existing barrels. They probably have a good reason, though it eludes me. Not like it would add any cost to the product or a re-design.

Redesigning costs. re-tooling costs, revising marketing information and every website selling them about the new version out there costs.

Entertaining all the customer requests if any one eyepiece still in the channel is the old or new one, outcries by binoviwer folks about the insanity of finding "matched" ones, requests for (free) replacements by the new ones, it all sucks.

 

I think the 3D printed spacers are the much better idea. One could even make then fairly precise to they clmap on on their own without needing any setscrews.. I made my own from PVC pipe, takes nothing but a hacksaw and sand paper to make them any thickness you could ever need.

Rubber O-rings work as well, readily available in many thicknesses at Hardware stores.

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Edited by triplemon, 12 March 2025 - 12:32 PM.

[Neanderthal]

......I think the 3D printed spacers are the much better idea. One could even make then fairly precise to they clmap on on their own without needing any setscrews.. I made my own from PVC pipe, takes nothing but a hacksaw and sand paper to make them any thickness you could ever need.

Rubber O-rings work as well, readily available in many thicknesses at Hardware stores.

At least all the Morphie's are parfocal except for the 17.5mm, which was a late release in the series. I've 3-D printed 2.5mm spacer rings for the Morpheus EP's (see post #21), they are a tight fit around the lower barrel and stay put without a set screw, work excellent!

[f18dad]

 

 

 

 

[Neanderthal]

Received the Paracorr 1 today and used the below steps to set it up:

 

1. Set the tunable top to setting #3.

2. Put some scotch tape across the opening (no 2" adapter).

3. Focused on the moon using the scope's focuser. I even used a magnifying glass to get the sharpest image I could.

 

If I am understanding correctly, this is the prime location for the Paracorr, correct? In this position, the drawtube was 31mm outward (interesting, as focusing with the GSO coma corrector is at 21mm out). I'm waiting on the PushFix adapter but gave the standard adapter a shot just for the heck of it.

 

I realize from the previous posts that this adapter is not optimum in my case, but I could rack the focuser enough to still bring the image into pretty darn sharp focus with very little, and I mean almost imperceptible, coma visible. Same result when I set it to setting 1, could still focus quite well. Either of these results are just a little better than what I am seeing with the GSO coma corrector. I spent quite a bit of time staring at the Double Cluster, the Pinwheel and Starfish clusters. Then M42, Sirius and finally ended with the moon. The APM 30mm UFF was quite stable and secure where the parfocal ring is attached, it's not coming out without undue force.

[Starman1]

Received the Paracorr 1 today and used the below steps to set it up:

1. Set the tunable top to setting #3.
2. Put some scotch tape across the opening (no 2" adapter).
3. Focused on the moon using the scope's focuser. I even used a magnifying glass to get the sharpest image I could.

If I am understanding correctly, this is the prime location for the Paracorr, correct? In this position, the drawtube was 31mm outward (interesting, as focusing with the GSO coma corrector is at 21mm out). I'm waiting on the PushFix adapter but gave the standard adapter a shot just for the heck of it.

I realize from the previous posts that this adapter is not optimum in my case, but I could rack the focuser enough to still bring the image into pretty darn sharp focus with very little, and I mean almost imperceptible, coma visible. Same result when I set it to setting 1, could still focus quite well. Either of these results are just a little better than what I am seeing with the GSO coma corrector. I spent quite a bit of time staring at the Double Cluster, the Pinwheel and Starfish clusters. Then M42, Sirius and finally ended with the moon. The APM 30mm UFF was quite stable and secure where the parfocal ring is attached, it's not coming out without undue force.

Good. Always start with that optimum position for eyepieces that do focus in the range of the top and only use the focuser for those eyepieces that need a little more in. The PushFix adapter will bring all the 1.25" eyepieces into the range of the Paracorr's top. It won't, of course, help any 2" eyepiece that needs additional in travel, like:
31 Nagler
21 Ethos
20 XWA
17 Ethos

[Neanderthal]

Finally had an opportunity to give the P1/Push-Fix adapter combo a try last night. Observing conditions were not great ("average" Transparency and "below average" Seeing according to Astropheric, and fairly windy) but we did have enough of a moon to double-check the position of the P1 (still @ 30mm-31mm racked outward as tested before). I found the best-focus/correction with the tunable top was all the way down, I was expecting to need to raise it a tad due to the Push-Fix having such a low optical length.

 

Anyhow, at this setting, I found the correction was excellent, all the way to the outer edges of the field, at least to my eye. I really concentrated at the star points around edge, and there were some times I think I could see coma - or maybe it was my eyes being strained, lol, it was way beyond the way I would normally observe. All in all, this was a good exercise and learning experience for me. Looking forward to taking this out to the dark site. 

[LDW47]

I'm trying to find the easiest solution to bring my 17.5 parfocal to the other Morphei as well as the APM 30 UFF. I have already made the UFF parfocal to the majority Morphs by using a 2" spacer. Now that I have a 17.5 Morph I want to get an adapter I can leave on it to make it like a 2" eyepiece but parfocal. I have heard that the Televue in-travel adapter works but I have also heard that it doesn't have threads for filters. I remember reading about an adapter that Baader makes that has threads for filters and might even be closer to parfocal than the Televue adapter. Is this information correct and is this the correct one?

 

https://agenaastro.c...bUaApl3EALw_wcB

 

Also, if this is the correct adapter, would a 2 "inch filter be safe from the bottom of the eyepiece hitting it upon insertion? (I've seen such poor designs I never assume anything anymore!)

Mine works perfectly for my Morpheus set and several other eyepieces, just screw the filter to the ep, ya think. Mine is the Tele Vue AIT-2125 adapter. Maybe its not the model you are looking for, I don't need it too often, depends on what scope I am using. I use it to gain focus period probably not what you are talking.  Sorry I didn't read all the posts to get the whole story.

Edited by LDW47, 03 April 2025 - 12:53 PM.