Sky-Watcher Honders-HAC125DX Advanced Catadioptric Minigraph
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Designed for fast, wide-field astrophotography, the Sky-Watcher HAC125DX is a 125mm f2 catadioptric astrograph with a 250mm focal length. Its compact Honders Advanced Catadioptric design gathers light at a remarkable speed, letting you build a signal quickly during short sessions. The rear primary mirror focuser and revised back focus make the camera setup straightforward, especially with small-sensor CMOS cameras.
Sky-Watcher Honders-HAC125DX Advanced Catadioptric Minigraph Key Features:
- 125mm f2 catadioptric astrograph built for ultra-fast wide-field imaging
- Lightning-fast f2 optics capture deep-sky data in very short exposures
- Compact 250mm focal length suits nebulae and large celestial structures
- Rear primary mirror helical focuser simplifies fine focus with cameras attached
- 16mm image circle matches popular small-sensor astro cameras
- Mangin mirror design controls aberrations in a short optical tube
- RAQ mirror coatings maintain high reflectivity and contrast
- Collimatable primary mirror cell supports long-term optical alignment
- Clamshell tube rings with V-style dovetail ease mounting on portable rigs
- Lightweight tube suits small mounts and grab-and-go imaging setups
FAQs:
What type of astrophotography is the HAC125DX best suited to?
The HAC125DX is designed for wide-field deep-sky imaging. Its 250mm focal length and f2 speed work well for nebulae, large galaxies, and star fields where field of view and exposure speed matter more than magnification. It is less suited to high-magnification planetary imaging.
Do I need autoguiding with this astrograph?
In many setups, autoguiding is not strictly necessary. The high-speed f2 focal ratio allows you to collect useful signal with much shorter exposures than slower systems. On a well-aligned portable mount, unguided exposures are often sufficient, especially with modern low-noise CMOS cameras.
Which cameras pair best with the HAC125DX?
The 16mm image circle is well matched to cameras using sensors such as the ZWO IMX533 and IMX585. These sensors sit comfortably within the corrected field, helping maintain sharp stars across the frame without unnecessary vignetting.
How is focusing handled during setup?
Focusing is done via a rear-mounted primary mirror helical focuser, which keeps the camera fixed in place while you adjust focus, helping maintain balance and reducing strain on adapters. Fine adjustments are easy to make, even with compact cameras attached.
Is the HAC125DX suitable for travel and portable mounts?
Yes. The short 399mm tube length and relatively low weight make it practical for travel and quick deployment. It pairs well with lightweight equatorial mounts, making it a strong option for users who value fast setup and short imaging sessions.
Product Specification
| Diameter [mm] | 160.0 |
| Focal Length [mm] | 250 |
| Included Accessories | Tube-Rings, Dew-Shield, Synta/Vixen-Type Dovetail, 1.25" Adapter, M42x0.75 Camera Adapters |
| Optical Tube Length [mm] | 399 |
| Optical Tube Weight [kg] | 3.81 |
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Your flexible credit options available
Interest Bearing
with a choice of repayment plans over 24 or 36 months 13.9% APR (representative)Buy now pay later
36 month loan with a six month deferral period, 18.9% APR (representative)Interest Bearing Finance
This option comprises term loan with a choice of repayment plans over:
- 24 months
- 36 months
The balance of the finance agreement is payable directly to Novuna Consumer Finance in equal monthly instalments by monthly direct debit. The direct debit payments will commence at the end of the first month following receipt of your goods. The interest rate charged is 13.9% APR (representative). Late payment and early repayment penalties apply; full details of these will be provided in the loan agreement pack.
For customers based in the Channel Island, please call us to apply for finance
| 24 Months | 36 Months | |
|---|---|---|
| Cash price | £599.00 | £599.00 |
| Deposit | £0.00 | £0.00 |
| Loan Amount | £599.00 | £599.00 |
| Monthly Instalment | 23 x £28.50 | 35 x £20.21 |
| Final Instalment | £28.50 | £20.21 |
| Total Amount Repayable | £684.00 | £727.56 |
| Representative | 13.9% APR | 13.9% APR |
Buy now pay later
The Buy Now Pay Later option comprises a 36 month loan following a six month deferral period.
During the six-month deferral period, it is possible to pay off the loan, either by way of a lump sum or in smaller amounts. If the loan is partially repaid within six months, the remaining interest will be adjusted to reflect the new balance. If the loan is fully repaid within the six-month deferral period, then no interest is payable, however, a £29 early settlement fee is payable in respect of repayments within these six months.
Following the six-month deferral period, Novuna Personal Finance will initiate a monthly direct debit payment for the remaining duration of the loan. Interest will be charged at a rate of 18.9% APR (representative) on outstanding balances (backdated to the first date of the loan). Novuna Personal Finance will send a reminder letter approximately one month before the six-month deferral period is due to elapse.
For customers based in the Channel Island, please call us to apply for finance
| Balance settled in full within the six month deferral period | Balance NOT settled in full within the six month deferral period | |
|---|---|---|
| Cash price | £300 | £300 |
| Deposit | £0 | £0 |
| Loan Amount | £300 | £300 |
| Settlement fee | £29 | £0 |
| Settlement payment | £329 | - |
| Monthly Instalment | - | 36 x £11.57 |
| Total Amount Repayable | £329 | £416.52 |
| Representative | 18.9% APR | 18.9% APR |