Telescopi Italiani TI35 f/3.5 Modified Harmer Wynne Astrograph
Price as Configured: $33,225.00
The Telescopi Italiani® TI35 f/3.5 packs 350mm of diffraction-limited aperture into a carbon fiber astrograph weighing just 51 lbs (23 kg) — one of the most capable transportable imaging instruments in its class. Deep Space Products is the exclusive U.S. dealer for Telescopi Italiani, and we're proud to be their first dealer worldwide. Questions about the TI35 or how it fits your imaging system? Contact us — we help customers match astrographs to mounts, cameras, and imaging goals.
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Frequently asked questions about the Telescopi Italiani TI35 f/3.5 Astrograph
What mount do I need for the Telescopi Italiani TI35 f/3.5?
At approximately 23 kg (51 lbs) for the OTA alone, the TI35 f/3.5 requires a mount with at least 30–40 kg of imaging payload capacity once you account for the camera, filter wheel, rotator, guide scope, and cabling. A 10Micron GM2000HPS or PlaneWave L-350 would be well matched. Deep Space Products carries both mount lines and can help you evaluate options based on your specific imaging train and whether the installation is portable or permanent.
How does the TI35 f/3.5 differ from the TI35 f/5.0?
Both models share the same 350mm aperture and Modified Harmer Wynne design, but they serve different imaging goals. The f/3.5 (1,230mm focal length) is optimized for high-throughput deep-sky imaging — it collects data roughly twice as fast per sub-frame and is ideal for large emission nebulae, galaxy groups, and narrowband work with full-frame sensors. The TI35 f/3.5 (1,750mm focal length) provides tighter image scale for smaller targets and an 85mm diffraction-limited field that can accommodate medium-format sensors. Deep Space Products carries both configurations.
How does the TI35 compare to the Officina Stellare RiFast 300?
Both are Italian-made Modified Harmer Wynne designs with carbon fiber construction, spherical secondaries for easy collimation, and multi-element correctors. The key differences are aperture (350mm vs. 300mm) and focal ratio (f/3.5 vs. f/3.8). The TI35 collects about 36% more light, reaches a faster focal ratio, and delivers a slightly larger corrected field — but it weighs a few kilograms more. If your mount can handle 23 kg plus your imaging train and speed is a priority, the TI35 pulls ahead. Contact Deep Space Products for a detailed comparison based on your specific system.
Is the quartz mirror upgrade worth it?
For permanent remote observatory installations — especially at sites with large nighttime temperature swings — the quartz option is a meaningful upgrade. Fused silica's near-zero thermal expansion means the mirror figure remains stable as temperatures change, reducing the need for frequent refocusing and improving consistency across long imaging sessions. For portable use or installations in thermally stable environments, the standard mirrors perform well. Deep Space Products can advise based on your specific site conditions.
Can I use the TI35 f/3.5 at a remote hosting facility like DSP Remote?
Absolutely. The TI35's integrated electronics — WiFi, Ethernet, ASCOM Alpaca–compatible focuser, optional automated dust cover, and optional field rotator — make it purpose-built for fully unattended remote operation. Deep Space Products operates DSP Remote, a Bortle 1 telescope hosting facility in southwest New Mexico, and can help you plan a TI35-based remote imaging system from mount selection through software configuration and installation.
What cameras pair well with the TI35 f/3.5?
The TI35 f/3.5's 62mm corrected field fully illuminates full-frame sensors (36 × 24mm diagonal ≈ 43mm) with significant headroom. Popular pairings include cooled CMOS cameras like the QHY600M and ZWO ASI6200MM. For monochrome imaging with narrowband filters, the f/3.5 speed is especially rewarding — you'll see meaningful signal accumulate in individual subs that would require much longer exposures at slower focal ratios. Deep Space Products carries QHY cameras and can help you configure the complete imaging train including filter wheels, off-axis guiders, and adapters.
Where do I buy the TI35 in the United States?
Deep Space Products is the exclusive U.S. dealer for Telescopi Italiani — and we were their first dealer worldwide. That means direct access to Telescopi Italiani's engineering team through DSP, knowledgeable pre-sale consultation, and system integration support that goes beyond simply placing an order. Contact us for current pricing, lead times, and to discuss your imaging goals.
What is the typical lead time for a TI35 f/3.5?
Because each TI35 is built to order in Telescopi Italiani's facility in Italy rather than mass-produced, lead times typically range from 8–12 months depending on the configuration and current production schedule. The quartz mirror option may affect timing. Contact Deep Space Products for the most current availability.
