Celestron telescope refractor cassegrain eyepiece 1.25" 42mm Ultima 1988 Japan

Description

This auction is for
1988 Celestron (Nihon Seiko or Vixen of Japan) 1.25-inch Ultima 42mm. In this rare offering it will come with BOTH original dust caps, the original, large rubber winged eye guard, and the original baggy for the eye guard.
Inspect the photos closely. This is in top collector's grade condition and is simply beautiful in that it has survived this long in this kind of condition. The only thing that could have made this better was having the original cream-and-orange striped box. The Ultima 42mm, like the Ultima 24mm, is the rarest of the 1.25-inch size Ultimas to come across. This particular model was very expensive and never ever offered as an inclusive eyepiece option on ANY of Celestron's refractors or schmidt-cassegrains.
And unique is the 42mm focal range as possibly the longest EVER focal length offered in a 1.25-inch barrel.
Model:  Ultima 42mm
Barrel size:  1.25-inches
Design:  5-element plossl
Optics:  fully multi-coated
Field of view:  36-degrees
Eye relief:  32mm
Threaded for filters:  yes
Materials:  milled brass, milled anodized aluminum, rubber grip, optical glass
Weight:  7.1 ounces
In many of my personal reports I have cataloged for my own, massive references on vintage telescopes, I use Ultimas as a benchmark for visual optical quality confirmation as these eyepieces are so well made and produce such bright images (especially to the edge of field), if you see fault in your images, it will not be this eyepiece, but within the telescope itself. I do not pull-out my Ultimas to any telescope on any given night. The seeing must be steady, the air dry and the telescope worthy.
Any Ultima eyepiece from Nihon Seiko and/or Vixen of Japan will give paramount sharpness and detail in your Takahashi FC-100, Orion VX-90 Fluorite, Astro-Physics Star12 ED, Celestron C11 Edge, Meade Maksutov 7, Ceravolo HD145, or Pentax 105SD to name a few of many fine examples of top grade telescopes in which this eyepiece will help fully exploit their optical greatness.
A pinpoint-to-the-edge 36-degree field of view awaits your eye. The Ultima 42 has one of the very longest (if not THE LONGEST) eye relief I have ever seen in a 1.25-inch barrel ocular. This means you'll get the entire view in even with eyeglasses left on. Outstanding to use on the Moon, M31, M42, the Double Cluster, Sagittarius Star Cloud region, Orion's Horsehead regional belt stars with  H-beta threaded filter, M45, and many other large deep sky objects.
The top-end optical perfection in the glass elements guarantees that in apochromat telescopes, the view will remain color free and there is NO introduced coma or astigmatism. Other than the narrower-than-normal field of view, which is absolutely inherit in an eyepiece barrel of this size with this large a focal length, it is faultless across the board.
Try this on NGC7331 in a Wilkinson, Beck, or Zambuto 10 to 16-inch mirror reflector. Find faint hazing of the Rosette Nebula around the Christmas Tree Cluster in your Meade 14 ACF LX200, C11 Edge, or Takahashi Mewlon 300; you will LOVE the sharpness and contrast!
Though not as rare, these Ultimas are identical to Orion's long-standing Ultrascopic line, which were manufactured by the same firm in Japan, and this also goes for the rarely-mentioned Parks Gold Series and Antares red-lettered and green-boxed plossls.
If you have an ocular turret with other additional Ultima eyepieces, they will be parfocal. I have done this both in my Takahashi FS-152sv and Takahashi FCT-150.
For a fun fact, this is one of the very earliest of the Ultimas you can find; the painted characters are Chevy orange, not ruby red, and is one of the defining features of a 1980s Ultima model.
Packed with great care. Higher cost in shipping indicates this MUST be fully insured to all global locations. For those in other nations, this can only go priority international so that it may receive full insurance benefits. WILL NOT SHIP in a USPS priority small flat rate box!! This eyepiece is too large and will bulge the dimensions; that box will NOT provide the protection this eyepiece deserves.
Back-illuminated (BSI) CMOS Sensor
The SV305 Pro uses an extremely sensitive CMOS sensor, the Sony IMX290.  This sensor has very high QE, and very low (0.7e-) read noise,
which improved
sensitivity in the visible-light and near infrared light regions for industrial applications.
128MB DDR Buffer
The benefit of the image buffer is that the memory will cache the image
and
it to the computer when the USB interface is not busy or being interrupted,
and the
frame will not be lost or corrupted.
Any Area ROI Support
A smaller region of interest (ROI) is read out from the sensor,    leaving the  image scale of the object being imaged, unchanged. Allow arbitrary resolutions to be set.
ADC 12bit
The SV305 Pro camera offers 8 bit RAW output or 12 bit.
USB 3.0
camera transfer speed is much faster. It is great for transfer the uncompressed astronomy data.
.
Back-illuminated (BSI) CMOS Sensor
The SV305 Pro uses an extremely sensitive CMOS sensor, the Sony IMX290.  This sensor has very high QE, and very low (0.7e-) read noise, which improved sensitivity in the visible-light and near infrared light regions for industrial applications.
128MB DDR Buffer
The SV305 Pro has a built-in 128MB DDRII image buffer. The benefit of the image buffer is that the memory will cache the image and transfer it to the computer when the USB interface is not busy or being interrupted, and the frame will not be lost or corrupted. This buffer also allows a slower computer with USB 3.0 socket to capture every frame without loss even if the USB socket is occasionally busy with other peripherals. This buffer also makes it possible to run multiple cameras using one computer without USB transfer problems.
Any Area ROI Support
The SV305 Pro has ROI function. A smaller region of interest (ROI) is read out from the sensor, leaving the image scale of the object being imaged, unchanged. Allow arbitrary resolutions to be set.
ST4 Guiding
SV305 Pro camera is the first guiding camera of Svbony brand.
It is designed with ST4 guiding port. Supporting the PHD2 software, and works with ASCOM plate form. You can use the computer to control telescope mounts have an autoguiding port that connects directly to the autoguider (usually referred to as an ST-4 port, which works with analog signals).
ADC 12bit
The SV305 Pro camera offers 8 bit RAW output or 12 bit.
Special Heat Dissipation Structure
The unique heat dissipation design makes the product run more stable. Long-term exposure time during use reduces the noise to a certain extent and makes the image quality better
Features
SV305 Pro camera is a sensitive and high-speed color astronomy camera for planetary imaging, lunar and solar imaging (with a safe solar filter), and some bright deep space objects imaging. This camera is also great for ‘lucky imaging’ of planets, double stars, and other compact objects, especially for telescopes with longer focal lengths.
NOTE:
Computer configuration requirements:
1)The configuration of desktop computer is not less than Intel 4 generation i5, and the memory is not less than 4G.
2)Laptop configuration is not less than Intel 6 generation i5, memory is not less than 8g.
2. This SV305 Pro camera is best used with a refractor or reflector telescope mounted on an equatorial mount that can accurately track the motion of the sky.  It is not intended for taking images through the eyepiece of a telescope. You may also require additional accessories and filters to get the best results. If you want to use the SV305 pro camera capture images through telescope eyepiece. you need buy an eyepiece projection adapter.
All software and drivers for this camera are available from the manufacturer’s website.
SV305 Camera and SV305 pro camera both are designed with SONY IMX290 CMOS sensor. So they have some same functions. Such as
1, Any area ROI functions.
2, 128M DDR buffer for transfer the images without any dropped.
3, Back-illuminated structure
4, ADC 12bit
1.What’s the difference between the SV305 Pro and the Sv305 ?
USB 3.0
SV305 pro camera is designed with USB3.0, SV305 camera is designed with USB2.0 port. So the SV305 pro camera transfer speed is much faster. It is great for transfer the uncompressed astronomy data.
Support PHD2 Guiding
The SV305 Pro is designed with ST4 guiding port. So it supports PHD2 software guiding. As a guiding camera, this is the basic function.
I know the ST4 guiding is complicated and old fashioned, we designed it for the elder astronomers who are good at ST4 guiding.
Download the latest version PHD2 software v2.6.9dev1, your SVBONY sv305 pro camera can be used as a guiding camera. Just try it.
ASCOM Driver
We also designed ASCOM driver for SV305 Pro camera. So the camera works on ASCOM platform with other software. This will attract more people interested in the SV305 Pro camera. Do you think so ?
Multifunctional camera
The SV305 pro camera can be used as the main capture software for capturing solar system objects and the planets.  Also it works as the guiding camera.
2.What software supports the SV305 pro camera ?
For
Windows users
, please download the sharpcap 3.2.6421 version and the latest version.
For
Linux users
, please download the AstroDMx capture for Linux, version 0.78.3 and the latest version.
For
Guiding
, please download PHD2 software v2.6.9dev1 and the latest version.
3.How is SV305 Pro camera?
Here are the testing results from Dr. Steve Wainwright. ( He has been an astronomer since 1967. He taught astronomy at the University of Swansea in D.A.C.E. evening classes for several years, but now, largely retired. For several years he has been working with his partner Nicola on AstroDMx Capture. They do great help for Svbony cameras working with Linux system. Many thanks for Steve and Nicola.)
https://x-bit-astro-imaging.blogspot.com/2020/08/the-sv305pro-camera-with-astrodmx.html
https://x-bit-astro-imaging.blogspot.com/2020/08/the-sv305pro-camera-with-astrodmx_15.html
Hope Dr. Steve’s blog will help you know more about the SV305 pro camera.
Any testing results of the astronomy capture
We don’t have any clear nights, so still waiting for your testing results of the SV305 pro camera. Very welcome to share your works about astronomy into our Facebook group Svbony Telescope Club.
This is screen shot of AstroDMx Capture for Raspberry Pi capturing a SER file of the Tycho region using an SVBONY SV305 Pro camera
Resulting image after Stacking, wavelet processing and post-processing
Svbony SV305 Pro works with Windows, Linux, and Raspberry Pi.
>
Windows system with Sharpcap software 3.2.6433 and latest version for Windows system
www.sharpcap.co.uk
>
Linux system with AstroDMx capture for Linux
& Raspberry Pi, Version 0.78.3 and Latest Version
https://www.linux-astro-imaging.uk/linux/astronomy/linux-downloads
>
PHD2 Software for Guiding, Version v2.6.9dev1 and Latest Version
Model
SV105
SV205
SV305
SV305Pro
Sensor
1/3" CMOS OV2710
1/3.2" CMOS Color
1/2.8" CMOS SONY IMX290
1/2.8" CMOS Color
Sensor Model
OV2710
SONY IMX179
SONY IMX290
SONY IMX290
USB Type
USB 2.0
USB3.0
USB 2.0
USB3.0
ADC
10 bit
10 bit
12 bit
10 bit/12 bit Out 8 bit/12 bit
Pixel Size
3µm
1.4µmx1.4µm
2.9X2.9μm
2.9µmx2.9µm
Resolution
2 Mega Pixels 1080x1920
8M Pixels(3264*2448 YUV 15FPS/S)
2 Mega Pixels 1920X1080
2M Pixels 1920*1080
Shutter
Electronic Rolling Shutter
Electronic Shutter
Electronic Rolling Shutter
Exposure Time
15ms~1000ms
1ms~30min
Gain
0-120
Automatic/Manual
Filter
IR CUT filter
IR-cut filter
IR CUT filter
Support OS
Windows
Windows
Windows, Linux, Rasberry Pi & Mac OS.
Windows, Linux, Rasberry Pi & Mac OS
Support Telescope
Telescope with 1.25'' diagonal base hole
Telescope with 1.25'' diagonal base hole
Power Consumption
150mA@5V
230mA@5V
200mA@5V
230mA@5V
Operating Temperature
-5°C~45°C
0°C~50°C
-5°C~50°C
-10°C~50°C
Storage Temperature
-20°C~60°C
-10°C~60°C
-10°C~60°C
-20°C~60°C
Interface Type
Standard UVC protocol
ROI support
Any area ROI
On camera image buffer
128M DDR buffer
Feature
ST4 guiding port. Supporting the PHD2 software
about svbony