This comparison shows the final stacked result of Mars captured with the Celestron NexStar 4SE and NexImage camera, presented at two different scales:
- Left: RegiStax result at 100% (original stacked resolution)
- Right: RegiStax “Resize 200%” result
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Mars through telescope Celestron NexStar 4SE - comparison
normal and zoom images
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What Does 200% Resize Mean?
In RegiStax v6.1, the “Resize 200%” option enlarges the stacked image using interpolation. This does not create new detail, but it spreads existing pixel information over a larger area.
This enlargement can make subtle brightness variations easier to sharpen with wavelets and easier to inspect visually.
RegiStax Resize vs Photoshop Zoom
At first glance, the 200% result appears slightly clearer. However, this improvement is subtle. The resize does not increase true optical resolution; it simply makes fine variations easier to process and evaluate.
If the image were enlarged later in Photoshop using standard scaling, the visual result would be very similar. The advantage of resizing inside RegiStax is that sharpening and wavelet processing can be applied at the larger scale.
Conclusion
For small targets such as Mars — especially when using a 102mm telescope — resizing can help present detail more clearly, but it does not substitute for real optical resolution or good atmospheric seeing.
Ultimately, the telescope aperture and atmospheric stability define the true limit of detail. The resize simply makes that detail easier to interpret.
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