Harry Siebert Optics Standard 4.9mm


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Brand and Model:Harry Siebert Optics Standard 4.9mm
Price ($USD):$89.00
Type:Misc Wide Angle
Focal Length:4.9 mm
Barrel Size:1.25 in
Apparent FOV:65.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:9 mm
Elements:5
Weight (lbs):
Description:

Vote Highlights Vote
Harry Siebert Optics Standard 4.9mm
I'm a bit of a fan of Siebert's eyepieces,I own the 2.9,4.9,7,10,15,21,and 32mm
EPs. I admit that I haven't compared them with the more expensive EPs from Televue,
etc. but from all the research I've done,I'm missing very little, if any, performance,
and have saved considerable money. I have used these EPs in a 6" f/5 Russian newtonian and a 10" f/6
Cave astrola with very good results for all observing applications.
The best views of Saturn I've ever had was with the 2.9mm in the Cave under excellent seeing. Would
recomend the entire line to anyone that appreciates good optics and doesn't miss the bragging rights of
owning a $250 EP.

Overall Rating: 10
Optics:9 Value:10
Weight: 10 (Trustworthy Vote)
Date:
By: eranbob
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=80672


Harry Siebert Optics Standard 4.9mm
I have a Discovery EQ 8 inch reflector that is an F/5, which I like very much. After much research trying out different eyepieces I decided to purchase an entire line on Siebert Eyepieces as I felt that they would give me the most for my eyepiece dollar. I have the 3.4mm, 4.9mm, 7mm, and 10mm 1.25” standard series; the 15mm, 21mm 1.25” Premium deep sky series; and the 32 Ultra Plus 2” eyepiece. Harry has been a pleasure to deal with and in the many times that I have spoken with him he has given me excellent advice as to which eyepieces would benefit me the most given my telescope and what I like to observe. He truly took the time to tailor my eyepiece selections to me and I don’t think that you can get that service easily anywhere else.

4.9mm review --> This was the first Siebert eyepiece that I bought. The first day I used it in the spring I caught Ganymede cutting in front of Jupiter and was able to see it's shadow on Jupiter for the first time ever! (I had tried on other nights but was unable) I was so impressed by the clarity of the view and the construction of the eyepiece that I decided then that I would by a whole set of Sieberts. There is nothing like high power wide angle eyepieces so you dont have to constantly fiddle with the telescope to follow an object. Also, the eyepiece glass is HUGE (as big as ordinary 12-15mm plossls!), and so easy to use. Why would anyone put up with a peephole when you can have this?

Overall Rating: 10
Optics:10 Value:10
Weight: 10 (Trustworthy Vote)
Date:
By: swsantos
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=111478


Harry Siebert Optics Standard 4.9mm
Excelsis has reversed the listing order. Some comments refering previous comments may be out of the proper order.

Overall Rating: No Vote
Weight: 10 (Trustworthy Vote)
Date:
By: Siebert
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=59501


Harry Siebert Optics Standard 4.9mm
I bought three of Harry's eyepieces about a year ago along with his 1.5~2.5x barlow. I still have the 4.9 and the barlow. The best views I have ever had of Saturn and Jupiter
were with the 4.9 and either my 8" f/6 or my 10" f/7 Newt. Oh, and I just sold my 6mm Radian because it wasn't as sharp and had severe ghosting on Jupiter. I have several other TV Panoptics, and
they are great. But I really like this 4.9mm when the seeing will allow using. I have split several sub arc sec doubles with the 4.9 in conjunction with the barlow. Wouldn't recommend using on planets as the magnification is really too much, but when you want to split two airy
discs it's the only way to go.

Overall Rating: 9
Optics:9 Value:10
Weight: 6 (Veritable Vote)
Date:
By: Anonymous (xxx.xxx.193.161)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=81492


Harry Siebert Optics Standard 4.9mm
Terrific value for the price.

Overall Rating: 8
Optics:7 Value:10
Weight: 5 (Veritable Vote)
Date:
By: jrgriggs01
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=185195


Harry Siebert Optics Standard 4.9mm
First some background info. I have a 7" f/6 Mak-Newt that is certified 1/8 wave .96 strehl and it is a screamer. Holds 550+X when seeing allows, not exagerating. Moon detail at this power is extraordinary. And now to the review of my first Seibert EP.

In my collection of EP's I have Panoptics, Naglers, Pentax's, Orion's (their Ultrascopic is very good IMHO), University Optics and now a Harry Seibert that I got on ASTROMART. I dont have deep pockets to buy EP's with, just a desire to have the best EP regardless of name and cost (within reasonable limits set by my wife). So I just had to try one of Mr. Seiberts EP's. For a comparison EP is chose my UO 6mm. I realize the difference in exit pupil and mag and all the rest, but this was the closest EP I had in this f.l. without using another EP/barlow combo.

So here goes.....I look at a near full moon and the detail in the HS was excellent. As far as I could tell just as good as the UO. The only thing i did notice was that when I had the moon in only 1/2 of the FOV, there was some serious stray reflection that produced ghosting in the dark sky part of the FOV. THis wasnt a problem to me however because the detail it showed otherwise was wonderful. This EP is exactly 220X in my scope a perfomed very well. Now onto the stars.....

The double double in Lyra was a clean split. Very nice indeed. Two sets of clean double airy disks with their first defraction
rings. Wonderful. Put the UO in and same thing. Wonderful split, nice clean black space between the stars. Both EP's had about the same black background yet for some reason, the UO seemed to come to that crisp sharp focus a tad easier....I have a JMI DX 1 dual speed focuser so I have very good control when finding that sweet spot for an EP. But it was very slight indeed if at all. Looked at star clusters and other doubles and the Seibert did very well. Moving on to comfort and ease of use.

The eye relief on the Seibert is about the same as the UO. Both of which you have to get up close and personal with, especially the Seibert if you want to see the entire FOV. At first eye positioning was "different". Not good or bad, but just took some getting used to. After several long sessions with this EP I have grown to really like it. It a keeper but so is my UO.

Bottom line: Very good EP and I enjoy viewing through it. Does it have an edge over the UO ortho's? Not really. Although the EP upper lense is about 2.5 times larger then the UO, you still have to get your eye as close and as centered. I really took time to analize this issue and the comfort gained through the larger upper lense in minimal if any. Its more of a psycological advantage as you hold them in your hand and look at them not as you put them in your scope and look through them. Bare in mind this is comparing a 6mm UO to a 4.9mm Seibert. I hear the eye relief is pretty tight on a 5mm UO. But all in all the Seibert views compared most favorably with the UO's. But now the kicker. You can get a UO for less then $60 and the Seibert is about 50% more at $90. Both these EP's are not for those wearing glasses so its a comfort issue and individual preference. Will I buy another one? Probably not. UO's are too good and too cheap while the Seiberts are very good yet not so cheap. But like I said, Im glad I bought it and I will certainly keep it. If you get one of these you will be very pleased.

Hope this is of some help.

Clear skies,
Erich Mayne

Overall Rating: 9
Optics:9 Value:8
Weight: 5 (Veritable Vote)
Date:
By: stargazer_62
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=143266


Harry Siebert Optics Standard 4.9mm
This is my first eyepiece from Harry and I will be buying another one soon. Views of Jupiter, Saturn and the moon are great when conditions allow 311x. I was most impressed by the very comfortable eyerelief. Image is bright and clear and if there was any distortion I didn't notice because I was to busy looking at the view. I have Panoptics and Radians and wish I would have tried Seibert Optics first and saved a lot of money. Harry personally makes and guarantees his products and is a pleasure to talk to. How can you go wrong!

Overall Rating: 9
Optics:9 Value:10
Weight: 4 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.7.168)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=78175


Harry Siebert Optics Standard 4.9mm
I bought the 4.9mm eyepiece for my NexStar 80 so that I could have a quality high magnification eyepiece. This eyepiece delivers everything promise and more. You can tell its a quality eyepiece from the moment you take it out of the box. It just feels good, solid and heavy. I have read some review of Harry's eyepieces that say that the eyepiece looks a little home made but I think it looks as good as most other eyepieces. The end of the barrel has a slight beveled to make it easy to insert into the the telescope. Its a nice touch and just shows Harry's attention to detail.

The eyepiece is very comfortable to use with its large lens and 7mm of eye relief. The eyepiece has a 65 degree field of view but it feels much larger when looking through it. The optical performance is impressive. The views are sharper and have better color than with my other eyepieces. I haven't had my scope for long so I don't have a lot of expericence but even for me the optical quality was obvious immediately. I would highly recommend Harry's eyepiece. I don't think you can get a better eyepiece for the price.

Overall Rating: 9
Optics:9 Value:9
Weight: 3 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.25.121)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=129117


Harry Siebert Optics Standard 4.9mm
This eyepiece sits nicely in a mid-price collection for people who don't like spending more on an eyepiece than their telescope. It's quite sharp across 3/4 of the field at f/6 (Stellarvue AT1010), and superb at f/11 (a Tal 100R refractor, stopped down to 92 mm for reasons of objective abuse). I did notice that increasing the focal ratio had less benefit than with some designs like orthoscopics; the outermost part of the field seems to resist flattening. But there's more field to play with, so this isn't really a problem.

I'm not sure this is a bargain compared with Plossls that have 52 or 55 degree apparent fields (Ultima and the like) and sell for a similar price. The extra field isn't worth writing home about. But it's got something about it, and I like it.

Roger Newman

Overall Rating: 8
Optics:8 Value:7
Weight: 1 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.176.110)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=240994


Harry Siebert Optics Standard 4.9mm
This eyepiece is Junk and Harry is famous for posting bogus rave reviews of his own products. If anyone dares to give him a negative review he flames them in public and in private.

Overall Rating: 3
Optics:3 Value:4
Weight: 1 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.0.233)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=142893

I thought I'd have to read a book for a dsicovrey like this!
>This eyepiece is Junk and Harry is famous for posting bogus rave reviews of his own products.  If anyone dares to give him a negative review he flames them in public and in private.


If this eyepiece is indeed junk as you say, why don't you return it? I have not used this one, but I do have his 7mm which I think is great. Also, what scope do you use this with? Some scope and EP combinations just dont work. I don't think Harry flames people. I think he is defending his product when others have flamed him. As far as posting bogus reviews, I can't speak on that, BUT I do believe there would be many more negative reviews than the few that are posted.
His eyepieces are not for everyone. I am sure those who can afford to pay $300.00 to $500.00 on a single eyepiece would be able to find some fault in the Sieberts. For the rest of us he is doing us a favor. 
Jason (not affraid to sign my name)
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