Backfocus spacing calculator
How much spacing does your camera train still need?
Astrophotography buying guides for the UK and Europe
Build an astrophotography rig whose parts actually work together — before you spend.
Buying a telescope, mount and camera in the UK or EU comes with hidden gotchas: focal length, backfocus, payload and power. These guides show you what to check first, so you do not end up with parts that will not fit or will not work together.
Start with a first rig checklist
Three picks. One decision.
Share the night sky without building a complicated rig
Setup, the view you expect, and a night everyone can share: see why Odyssey Pro leads our family-observing shortlist, and when Seestar or Vespera is the better fit.
Find your family telescopeStart with your project
What are you putting together?
Free browser tools
Check a plan with your own measurements
Astrophotography battery runtime calculator
Will the telescope battery last through your planned night?
Telescope camera field-of-view calculator
Will the target fit the camera frame at this focal length?
Popular rig guides
Start with the guides that answer the most common buying questions
Optical planning
Choose focal length and field of view before choosing a telescope
Plan an imaging setup around target size, sensor dimensions, image scale and local seeing instead of aperture alone.
Mounts
Why mount payload is not the whole answer
How focal length, moment arm, wind, balance and guiding change what an astrophotography mount can realistically carry.
Filters
Broadband or narrowband filters: start with sky and target
Choose an imaging filter strategy around target emission, local light pollution, camera type and available clear hours.
Before you buy
The small, checkable details that stop a rig from being a paperweight
A camera can screw onto a telescope and still sit at the wrong distance. Check the spacing, connections and field of view before you add another box to the basket.
Check backfocus and spacingPower, guiding and where you buy
Do not forget power, guiding, and where you will actually buy it.
Image scale, payload, guiding and regional buying decisions deserve the same attention as the telescope itself.
Power
Build an astrophotography power budget that survives the night
Calculate voltage, peak current, connectors and cold-weather reserve for a dependable portable imaging setup.
Optical train
Backfocus and spacing without guesswork
Map adapters, filters and sensor position into a measurable optical train before ordering astronomy accessories.
Smart telescope comparison
Best smart telescope for beginners: see nebulae without building a rig
Want nebulae without building a full telescope rig? Compare three smart telescopes by setup, framing, price, battery and the kind of night you want.
Family stargazing comparison
Best smart telescope for family stargazing: share the sky, skip the rig
Share galaxies without building a complicated rig. Compare Odyssey Pro, Seestar S50 Pro and Vespera II for family viewing, setup and the price you can justify.
Buying well
Buying astronomy equipment across the UK and EU
Compare landed cost, VAT, warranty, returns and product variants before choosing a cross-border astronomy retailer.
Astrophotography calibration
Build a calibration checklist that matches your camera
Match darks, flats and bias or flat-darks to your camera settings and processing workflow, with a practical record for deciding what to capture again.
Astrophotography exposure planning
Choose sub-exposure length with a short test sequence
Use raw image statistics, bright-star checks and a repeatable exposure trial to choose individual frame lengths, then plan retained integration separately.
Deep-sky imaging technique
Set up dithering by checking pixels, pauses and the next exposure
Translate guide-camera pixels into imaging-camera movement, find the right controls and verify settling with a short capture trial.
Astrophotography troubleshooting
Elongated stars: build a diagnosis before changing the rig
Use a controlled sequence of short and long exposures to investigate tracking, differential flexure, tilt and corrector spacing.
Portable telescope setup
Rehearse your telescope’s cable route before the first slew
Prepare a portable telescope’s cable route with a movement rehearsal, clear stopping rules and a short inspection before each new target.
Imaging session planning
Find your usable imaging window: darkness, Moon altitude and local obstacles
Turn a darkness calendar into a realistic imaging timetable by overlapping astronomical night, Moon position, target access and setup time.
Focus measurement and session records
Record focus changes before choosing a temperature trigger
Build a comparable focus record across an imaging night, separate filter changes from temperature observations, and decide what evidence supports a refocus trigger.
Guiding
Guide scope or off-axis guider: choose by failure mode
Compare guiding approaches through focal length, flexure, available guide stars, spacing and setup complexity.
Image scale and sampling
Does your image scale justify changing the camera?
Separate pixel scale, measured star width and atmospheric seeing before deciding whether a camera or focal-length change deserves consideration.
Imaging workflow
Plan an imaging weekend’s storage before the first exposure
Separate capture, processing and backup space, then rehearse your folder structure with a small batch before an imaging weekend.
Imaging automation
Before automating a meridian flip, rehearse the whole handover
Prepare a supervised meridian-flip rehearsal that checks sequence timing, recentering, guiding and the first saved exposure after the move.
Plate solving
Rehearse plate solving on a saved image before your next clear night
Check image scale, sky-position hints and offline solver files with a saved-image rehearsal, then use a controlled failure checklist.
Target framing and camera rotation
Turn a framing preview into a camera rotation plan
Choose a target composition, allow room around important features and carry the planned centre and rotation into a checked first exposure.
Buying reviews
Unistellar Odyssey Pro review: is the eyepiece worth it?
A research-based Odyssey Pro review for shared stargazing: the electronic eyepiece, framing limits, carrying weight and checks before you buy.