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APM 150ED review

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#26 ZX12

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Posted 21 February 2019 - 09:58 AM

The 150 works superbly with low power 2" eyepieces, but I have noticed from my observing notes the magnification range I use most often with each of the APM binos scales up with objective size.

 

Calculate the exit pupils and its near 1.5mm to 3mm typically, which darkens the sky just the right amount in my location to give the best image.

 

(70mm - 28x-40x)   (100mm - 32x-55x)   (120mm - 38x-82x)   (150mm - 48x-103x)

 

Sometimes I use lower or higher powers than these, but prefer to leave one set in depending on the object rather than constantly switching out eyepieces, particularly in the winter. 

 

I can also see why the 150 compared so well against my 12" SCT using 103x the other night on M13. The exit pupil is half the size of the 12", making it really pop out against the darker sky. 

 

I think if the seeing improves, I can get a better idea of the amount of stars that are resolved, especially for the 12" as it suffers more in marginal conditions.

 

Mike


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#27 denis0007dl

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Posted 22 February 2019 - 11:12 AM

Keep us posted withyour findings ;)



#28 garret

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Posted 23 February 2019 - 02:42 AM

 

(150mm - 48x-103x)

48x = 17.5 Morpheus (field = 1.56 degree, 3.1 mm exit pupil)

103x = 8mm something...

 

All 1.1/4", no need for 2" eyepieces.

Widest possible field with 1.1/4" ep: 1.84 degree.



#29 Mad Matt

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Posted 23 February 2019 - 03:05 AM

The Pleades and Andromeda in a 6” bino at the largest possible exit pupil is something very special. I experiance it with a 25x150 Fujinon and it was one of the OMG experiences. You will need a good 2” WA eyepiece for that 😁
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#30 garret

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Posted 23 February 2019 - 07:09 AM

 

The view was similar to what is seen in my Meade 12" F/8 SCT.

Another impressive sight is the brightness and resolution of the globular cluster M13. Again, it's very comparable to what I see in the 12" SCT

M13 has a hidden secret: three relatively starless lanes in the shape of a propeller (Y shape), I have seen it quite easily with my 12" SCT (100 or 140 power) many years ago.

This feature should be visible in the 150mm BT under good, dark sky conditions, give it a try!

 

edit: translation errors

 

Garrett


Edited by garret, 23 February 2019 - 12:00 PM.

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#31 ZX12

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Posted 23 February 2019 - 09:57 AM

I really like having the ability to use 2" eyepieces when the conditions are right. Sweeping the Milky Way would be quite an experience, along with the widest possible field to take in M31.

 

Another fascinating object is M37. There appear to be a hundred tiny stars that sparkle at low power. (More like diamonds on dark blue velvet, rather than black around here)    

The Fujinon looks great here as well, but the APM gives the next step up in image quality. 

 

When I was comparing the APM150 with 30mm UFF's to the Fujinon 150 on the first quarter Moon, it was amazing how the view felt so large and wide in the APM. Actual measurements show them to be close in field size with the Moon being slightly larger in the APM due to the 27.5x. 

 

I typically use Televue Delos from 6mm thru 14mm and the 17.5mm Morpheus, which has slightly better edge sharpness than the 17.3 Delos in the APM's. Also the 3-6 Nagler zoom for checking the optics on tight doubles.

The 32mm Masuyama feels like having a gigantic pair of 18x70 Nikon's in the 150. Very sharp center with field curvature gradually distorting the image as you approach the edge.

 

Also in the collection are the 12.5 Doctor and the APM 12.5 HI-FW. After getting some more viewing time, I feel the Doctor has a slight edge in contrast while the APM shows stars slightly better at the edges. True field appears identical.

The two eyepieces are so close is performance that I can put one of each in the 150 and have a perfectly matched view with both eyes.

 

The 24mm Pan and 24mm APM will be next to see how they compare in the 150. I like the 24 APM better in the 70 and 100, while it's a draw in the 120.

 

The sky has still been poor is both seeing and transparency here, but I will give M13 another shot on the next good night.

 

Mike 


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#32 garret

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Posted 23 February 2019 - 12:05 PM

 

Also in the collection are the 12.5 Doctor and the APM 12.5 HI-FW. After getting some more viewing time, I feel the Doctor has a slight edge in contrast while the APM shows stars slightly better at the edges. True field appears identical.

The two eyepieces are so close is performance that I can put one of each in the 150 and have a perfectly matched view with both eyes.

How about eye relief?, APM claims 23mm, some reviewers claim effective er is only 16mm...



#33 faackanders2

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Posted 23 February 2019 - 01:02 PM

The Pleades and Andromeda in a 6” bino at the largest possible exit pupil is something very special. I experiance it with a 25x150 Fujinon and it was one of the OMG experiences. You will need a good 2” WA eyepiece for that

My best view of M31 was at the Mauna Kea mid station with my 25x100mm Appogee 3 deg TFOV and one view with the core filed the view 80% and then I had to pan to see the rest and that FOV was filled 40%.  I can only emagine what the view would be with 25x150mm and 2" 40mm 70AFOV University Optics MK-70 Koeing eyepieces would be like - but I still think you would have to pan to see it all from the same or similar site up in the top of mountains above lots of our atmosphere.



#34 Beg

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Posted 23 February 2019 - 01:42 PM

Well, if you have the finances and a decent observing location, it sounds like the ultimate observing tool for binocular astronomy lovers. It sounds reasonably manageable with the large handle and compactness for what it is. With a tripod caddy you can wheel that thing around the driveway or patio if not permanently mounted. 

 

And if it is comparable to the views of a 12" SCT, that is pretty amazing. And with 2" EP's, it sounds even more cool. If it gets discontinued for some reason it's going to be the one that got away.


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#35 salico

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Posted 23 February 2019 - 01:49 PM

I would add the Nagler 12 to the collection. They are amazing in my ED 120 BT and should do the same in the APM150...



#36 ZX12

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Posted 23 February 2019 - 05:09 PM

Garret,

 

I did not measure eye relief of the APM 12.5 precisely, but I would put it just short of the Televue Delos from my experience. They are very comfortable to use like the Doctor 12.5, but I don't wear glasses so it's hard say how they work for someone that does.

 

While viewing, it was difficult to tell them apart from the Doctor's without looking at the eyepiece. 

 

At 66x in the 150, they hit a nice power threshold when seeing is less than optimal. 

 

I'm looking forward to trying them in the APM 70 at 32x.

 

Mike

 

 


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#37 ZX12

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Posted 27 February 2019 - 01:06 AM

Tonight was my first chance to view through the APM150 with excellent transparency, fair seeing and no Moon. 

Looking at M3 with a pair of 8mm Delos (103x) in the 150 and a 24 Panoptic (101x) in the Meade 12", the image is equally pleasing in both instruments.

The 12" shows a slightly brighter and more resolved core looking directly, while the 150 looks similar using averted vision.  

M3 also appears larger in the 150, especially when using both eyes compared to just looking through one side.

 

The view of M42 looked better in the 150 because the Delos provides a slightly larger field than the Panoptic and frames the sweep of the nebula perfectly. The core was a bit brighter in the 12", while the 150 made up for it with excellent contrast. 

Several of the very faint stars that surround the Trapezium are visible in the 150 with averted vision, while the 12" resolves them directly.

The E star was visible in both, but seeing wasn't allowing the F star to show up.

 

I also tried the 17.3 Delos (47x) in the 150 and was surprised to find the stars quite sharp near the edge compared to the smaller APM binos. Possibly due to the longer focal length.

It was too cold to do more comparisons, but from memory I think the 17.3 Delos has a slight edge on the 17.5 Morpheus in this regard. Very nice views at this power and field size(1.5 degrees).

M37 was a beautiful sight with 100 stars or more resolved into perfect little points of light. I can move the cluster right to the edge and it still looks sharp and resolved.

The galaxies M81/82 are also captured in the same field at this power. A hint of spiral arm is visible in M81 with a very bright core and M82 bright along it's entire length. 

 

Having a 150mm binocular with variable power has made it difficult to go back down in aperture because of it's ability to look very deep into the sky, but as I found with telescopes it's rewarding to use smaller ones more often and break out the big glass when conditions are better.

 

Mike    


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#38 clivemilne

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Posted 27 February 2019 - 04:32 AM

How about eye relief?, APM claims 23mm, some reviewers claim effective er is only 16mm...

 

I have measured the APM's using the graph paper method.

Definitely 16mm.   (from the metal housing with the eye cup removed.)



#39 edwincjones

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Posted 27 February 2019 - 06:01 AM

..................... it sounds even more cool. If it gets discontinued for some reason it's going to be the one that got away.

 

I would think the main reason it would be discontinued would be slow sales.

I would guess Markus ordered a batch, and is waiting until these are sold before ordering more.

 

How long has the fujinon 150 been offered-  > 25 years, inspire of low sales?

 

edj


Edited by edwincjones, 27 February 2019 - 06:04 AM.


#40 ZX12

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Posted 06 March 2019 - 12:03 AM

A few more notes on the APM 150.

 

I had a chance to set up my APM 70 with the 150 to see the differences between the largest and smallest of the line and it was quite interesting.

 

In the 70 were the 12.5 APM Hi-FW eyepieces, providing 32x and a 2.6 degree field. Possibly the best combination I've tried in the 70 so far.

Looking at M37 presents a near perfect image with stars sharp across the field and a nice porthole in space effect. Roughly 30 stars visible in a quick count during good transparency and fair seeing.

 

The 150 had a pair of 24 Panoptics, giving it 34x and a 2 degree field. I prefer the Pan's over the 24mm APM only because the field stop is more distinct in the 150. Both are very sharp to the edge.

The image through the 150 at 34x is like looking at a completely different object. Much brighter with over a hundred stars visible, giving the effect of a more dense cluster.

The sky background is noticeably lighter due to the larger exit pupil which takes away from the overall effect slightly. The 68 degree apparent field size of the Pan's is not as impressive as the 12.5's 84 degrees.

 

Both views are pleasing in their own way regardless of aperture, and by choosing the right eyepiece for a particular situation you can achieve the desired effect. 

 

I think my favorite low power eyepiece (below 50x) with the 150 in suburban skies is the 17.3 Delos. It has a nice combination of power, sharp field, and exit pupil for a darker sky background.

 

The 21 Ethos would be something if the barrels were made smaller and it came to focus.

 

Mike

 


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#41 waldi

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Posted 06 March 2019 - 01:23 PM

I am not surprise at all. The aperture difference between both is huge. So it's obvious result.

 

What about differences between 120 and 150mm ?

 

Many thanks in advance.

 

Rgds ,

Waldi



#42 ZX12

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Posted 06 March 2019 - 03:07 PM

Hello Waldi,

 

 I posted the comparison between the 70 and 150 for people that do not have the opportunity to look though both binoculars side by side, not to see if the 70 can keep up with the 150.

While it's obvious the 150 is more capable in brightness and resolution, the 70 provides a darker sky background at low powers in areas with light pollution.

In my region that power is around 50x and higher with the 150, giving it a 3mm exit pupil or smaller.

 

The 120 is very capable and would satisfy many users that don't want to deal with the size and weight of the 150.

Image brightness is noticeably less in the 120, while sharpness is comparable in most regards other than the 120 having slightly better color correction.

 

The best gains I've seen in the 150 over the 120 are:

 

Pulling in galaxies better, making their shape and size more apparent.

 

Globulars are clearly brighter and more resolved.

 

Stars that are too faint to be seen in the 120 become resolved, giving open clusters more density.

 

You can see this clearly in clusters like M37 where each jump in aperture increases the amount of faint stars until you get to the 150, where it is spectacular.  

 

Mike


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#43 ZX12

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Posted 06 March 2019 - 08:31 PM

If you have extreme IPD or have the barrels turned down, the 21 Ethos would be nice for moderately dark skies at 39x and a 2.5 degree field.

 

It comes to focus with range to spare in the 150. Eye relief is a bit tight and would probably be difficult for eyeglass wearers.

 

Mike

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#44 waldi

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Posted 08 March 2019 - 03:13 AM

Thanks a lot!



#45 Mad Matt

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Posted 08 March 2019 - 04:16 AM

If you have extreme IPD or have the barrels turned down, the 21 Ethos would be nice for moderately dark skies at 39x and a 2.5 degree field.

 

It comes to focus with range to spare in the 150. Eye relief is a bit tight and would probably be difficult for eyeglass wearers.

 

Mike

 

Is it just me or do the 150's make the 21mm Ethos look... tiny grin.gif bow.gif waytogo.gif


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#46 GamesForOne

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Posted 08 March 2019 - 09:04 AM

If you have extreme IPD or have the barrels turned down, the 21 Ethos would be nice for moderately dark skies at 39x and a 2.5 degree field.

 

It comes to focus with range to spare in the 150. Eye relief is a bit tight and would probably be difficult for eyeglass wearers.

 

Mike

What about the 17 Ethos for 48x with a slimmer upper body for smaller IPD?

 

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#47 Tamiji Homma

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Posted 08 March 2019 - 09:54 AM

 

What about the 17 Ethos for 48x with a slimmer upper body for smaller IPD?

 

I've tried a pair of Ethos 17 and Ethos 4.7SX in binoviewing.  They didn't work for me, not comfortable at all.

Nagler 22T4 and Panoptic 27 worked well.  For lower power, APM UFF 30 is the best option for binoviewing so far.

 

Tammy


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#48 ZX12

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Posted 09 March 2019 - 02:26 PM

I agree, the 30mm UFF is the best of the 2" eyepieces I've tried. Very comfortable to use with easy eye placement and relief.

 

The Ethos seem best suited for mono viewing. 


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#49 oldmanrick

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Posted 09 March 2019 - 06:47 PM

Thanks for that info, guys.  

 

I would think that one or two good pairs of 2" eyepieces plus a good selection of shorter 1.25's would be all that's needed for these 150's.

 

In my case I have no 2 inchers, but a fair selection of 1.25 pairs, so I guess that would get me started.  Would definitely plan to add the 30mm UFF's if I could ever afford them after buying a 150.tongue2.gif  

 

I think an additional longer 2 inch pair would be desirable too, if any could be found that would work for bino viewing.hmm.gif



#50 ZX12

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Posted 09 March 2019 - 08:35 PM

Rick,

 

The 150 comes with a pair of 30mm UFF's.

 

The only other longer F/L  2" that works well so far with eye comfort is the 32mm Masuyama, which has a very sharp center field with field curvature distorting the outer 25 percent.

 

I did try a 55mm Plossl for fun, but you have to pull it out very far from the holder to achieve focus. 

 

Favorite 1.25" eyepieces are 8, 10, 14, 17.3 Delos and the 12.5 APM or Doctor 84 degree.

 

Right now I'm comparing the APM120 using the 14 Delos and the APM150 with 17.3 Delos, giving both around 47x with a slightly smaller exit pupil for the 120. Excellent power for open clusters.

 

Mike

 

 


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