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Pier 7 - Small FOV

William Optics FLT132 F/5.6 APO Refractor

Telescope

A William Optics FLT132 I hear you mutter, well before you go any further try it I dare you, it will shock you with how good it is I tell you. I have owned many 5” APO’s and this is as good if not better than all of them.

Its field is flat, it has tiny stars and colour correction is spot on, combine this with a relatively fast F5.6 and you have a short/medium focal length astrograph that ticks all the boxes.

This telescope when combined with a 4/3rds sensor have a smaller FOV so is a great way of getting up close and personal without having to use massive focal length telescopes and all the added expense that entails.

CMOS Camera

Just in case you have never used CMOS and have been using CCD like the rest of us for the last million years then let me tell you it requires a different approach, you can forget long subs as the are not needed and at most times detrimental to your image quality.

Allowing for CMOS’s sensitivity, higher dynamic range and super low read noise broadband imaging typically 60s is ample and 120s for narrowband, you just needs a lot more of them of course. This camera is set to Unity Gain as our default.

Pier-7 is an unguided system so the maximum sub length is 300s

Equipment List

Telescope	William Optics FLT132 F5.6 APO
Mount	Paramount MX
Camera	ZWO ASI1600MM Pro CMOS Camera
Filter Wheel	ZWO 7 Position
Filters	ZWO LRGB Ha-37nm o3-7nm s2-7nm
Guide Camera	ZWO ASI-120 - 1x1 Binned
Guider	OAG Integrated
Focuser	Robofocus Electronic
Power & Dew Control	Mount Hub pro V4

4/3" CMOS Sensor
21.9mm Diagonal
4656x3520pixels
3.8µm

Bayer Matrix Parameters

N/A

1.32° x 1°
1.02 "/PX @ 1x1 Binning
768mm Focal Length
F/5.6
25º Imaging Horizon Limits
Camera sensor is fitted in Landscape mode

Recommended sub lengths

Broadband Imaging

Filter	Bright	Dim
Clear	n/a	n/a
Lum	10-120s	120-300s
Red	10-120s	120-300s
Green	10-120s	120-300s
Blue	10-120s	120-300s

Narrowband Imaging

Filter	Bright	Dim
Ha 3nm	60-180s	180-300s
Hb	n/a	n/a
O3 3nm	60-180s	180-300s
S2 3nm	60-180s	180-300s
N2 3nm	60-180s	180-300s

Imaging subjects with brighter cores will of course require shorter sub lengths for HDR, your personal experience will be needed to gauge this yourself.
Please remember this is only a guide above, we are just trying to help you have the best experience possible remote imaging with Roboscopes.
Roboscopes supply the site and control the equipment but you choose everything else from filters, object/co-ordinates to sub lengths. So you need to exercise due diligence and experience when booking because if you fill the booking form out with incorrect details then you will get precisely that.
It is not Roboscopes responsibility to check your detailed requirements after you have booked.

Filter weights

Get accurate star colours with our filter weights

	Filter	Weight
	Red	TBA
	Green	TBA
	Blue	TBA

Calibration Files

This pier has a FREE calibration library, this includes a dark library that correlates to the most common subs lengths used, see below

30s Darks
45s Darks
60s Darks
120s Darks
180s Darks
240s Darks
300s Darks
600s Darks
900s Darks
1200s Darks
1800s Darks
Bias Frames
Flat Frames - L, R, G, B, Ha, o3, S2

If you choose more individual sub lengths eg 550s, then darks are not included in the price and are taken for you on an individual basis. Please add darks to your imaging run in checkout.

Field of view examples

M16 The Eagle Nebula

M31 The Andromeda Galaxy

M42 The Orion Nebula

Proud to use

FLI
656 Imaging
10 Micron
Planewave
ZWO

Resources

Company Details:

Roboscopes

802 Kingsbury Road
Birmingham
B24 9PS
United Kingdom

Pier 7 - Small FOV

William Optics FLT132 F/5.6 APO Refractor

Telescope

CMOS Camera

Telescope

Camera

Mount

Telescope

Camera