Barlowing Orthoscopics

I enjoy using orthoscopic eyepieces and keep a small set in addition to my other eyepieces. The focal lengths I have are 25 mm, 18 mm, and 12.5 mm. The 12.5 mm has the minimal eye relief I am comfortable with so I do not own shorter focal lengths. I am considering a barlow to get 9 mm and 6.25 mm at this time, but there are so many choices. Any recommendations would be appreciated. I would prefer to keep the cost under $ 100. Thanks in advance, Mike

The Celestron Ultima 2x, and the Klee 2.8x are both highly regarded, and both under $100.00. They often show up for sale used here on Astromart. I use both, and think you would enjoy either one.

My personal top pick is the TeleVue 3x Barlow,
but the ones mentioned by Larry are also good.
I like the fact TeleVue is a little bit taller,
so on Newtonians I can move back a little farther
from the telescope tube.

You probably do not want to hear this but my take on barlow is a bit different.
First, I also use Orthos all the time, but my scopes are all long focus and require no barlows, but if I am forced to use barlow and am willing to accept additional glass in the light path then for me the best solution is to get an eyepiece with some form of built-in Barlow, most of these have generous eye relief and work reasonably well on planets.
Another option is Tak LE series, their 7.5mm is my choice planetary eyepiece with binoviewer.

Vahe

Thanks for all of your comments. I finally picked up a Celestron Ultima SV and it is awesome! It came today and fortunately so did a very clear sky. It worked well with the orthos and with every other eyepiece I own, including my 5mm Planetary. In my refractor a barlowed 5mm gives 400x, and the views of Saturn, Venus and the Moon were very nice. Again thanks for the advice. I believe this piece of equipment will be used by me very often indeed.

Clear Skies,

Mike