Telescopi Italiani TI35 f/5.0 Modified Harmer Wynne Astrograph
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Frequently asked questions about the Italian Telescopes TI35 f/5.0
What is the difference between the TI35 f/3.5 and the TI35 f/5.0?
Both instruments share the same 350mm aperture, Modified Harmer Wynne optical design, carbon fiber construction, and built-in automation. The f/5.0's 1750mm focal length produces a more moderate image scale than the f/3.5's 1230mm, making it well-suited to mid-size deep sky targets where the faster system's field is wider than needed. The f/5.0 also delivers a larger diffraction-limited corrected field — 87mm diameter versus 62mm — giving it an advantage with the largest current imaging sensors. The f/3.5 collects light faster and provides wider framing; the f/5.0 offers more focal length and greater large-sensor coverage. Deep Space Products can help you decide which configuration fits your imaging program.
What sensors does the 85mm corrected field cover?
The TI35 f/5.0's 87mm diffraction-limited image circle fully covers full-frame sensors (43mm diagonal), APS-H sensors, and many medium-format CMOS sensors including the IMX461 (54mm diagonal). Most large-format astronomy cameras currently on the market fall well within this field. This is one of the largest corrected image circles available in a portable 350mm astrograph.
Is the TI35 f/5.0 suitable for narrowband and near-infrared imaging?
Yes. The three-element ED corrector maintains diffraction-limited correction from 400nm to 1.2 microns. This means the TI35 f/5.0 performs equally well in Hα, SII, and OIII narrowband filters and in near-infrared bands used for emission-line and exoplanet work. No filter-specific corrector swap or adjustment is required.
What mount does Deep Space Products recommend for the TI35 f/5.0?
The 10Micron GM2000HPS II is the preferred pairing for the TI35 f/5.0. Its payload capacity and exceptional unguided tracking performance are well matched to a 350mm imaging astrograph, and the combination works equally well in the field or in a permanent observatory. The GM1000HPS EP is also compatible and will work with the TI35, though the GM2000HPS II is the stronger choice for serious long-session imaging. For larger observatory builds, the 10Micron GM3000HPS or GM4000HPS provide additional headroom for a full imaging train. Deep Space Products is the exclusive U.S. certified servicer for 10Micron and can configure the complete system for you.
Can the TI35 f/5.0 be used at DSP Remote?
Yes. The TI35 f/5.0's built-in Wi-Fi control, ASCOM Alpaca-compatible secondary focuser, optional automated dust cover, and optional field rotator make it well-suited for unattended remote operation. DSP Remote is a Bortle 1 hosting facility in southwest New Mexico operated by Deep Space Products. Contact us to discuss hosting the TI35 f/5.0 as part of a complete remote observatory system.
Is a Fused Silica (Quartz) mirror option available?
Yes. Italian Telescopes offers a Fused Silica primary mirror option for customers who need the best possible thermal stability. Fused Silica has a thermal expansion coefficient approximately six times lower than standard borosilicate glass, which is particularly valuable in permanent observatories where temperature changes between sessions are significant. Contact Deep Space Products for current pricing and lead time on this option.
How does the TI35 f/5.0 compare to the PlaneWave CDK14?
The PlaneWave CDK14 operates at f/7.2 with a 2563mm focal length — a longer, narrower system primarily suited to smaller-sensor cameras and higher image scale work. The TI35 f/5.0 offers a faster focal ratio and an 87mm corrected field that covers significantly larger sensors than the CDK14's 70mm image circle. The TI35 also integrates its focuser, control electronics, and automation natively, whereas the CDK14 ships without a focuser. The two instruments serve different imaging workflows; Deep Space Products can help you identify which is the better fit for your program.
Does Deep Space Products service Italian Telescopes astrographs?
Deep Space Products is the authorized U.S. dealer for Italian Telescopes and supports customers with pre-sale consultation, system integration guidance, and post-sale support. Our team has hands-on experience with the TI35 platform and can assist with questions about collimation, control software setup, and observatory integration. Contact us directly for support needs.
