A suitable finder for a little Mak

[Pixies]

Hi,

A question for anyone with a 90 Mak.

Wide angle EPs aren't possible, so the available FoV through the scope is limited with a slow f13.8 3.5" scope.

It has an RDF, but is a straight 6x30 a better option as the finder? Anyone with any experience of using both types of finder with a small slow scope?

 

Cheers

 

[johninderby]

A SW right angle finder is a good choice.

https://www.harrisontelescopes.co.uk/acatalog/skywatcher-6x30-right-angled-erect-image-finder--bracket.html#SID=22

I’ve used one on a 100 mak but with a low profile bracket. Can be used as is or can remove the riser part with a minor mod. Replaced the stock screws with nylon ones to hold the finder. This pic shows it on another scope.

https://www.amazon.co.uk/Yunir-Adjustable-Astronomical-Telescopes-Sky-watcher-default/dp/B088WRYFXT/ref=sxts_sxwds-bia-wc-p13n1_0?cv_ct_cx=laser+pointer+bracket&dchild=1&keywords=laser+pointer+bracket&pd_rd_i=B088WRYFXT&pd_rd_r=4ba2878e-2ea5-4959-a9ab-1b170e9b4a62&pd_rd_w=aIu7E&pd_rd_wg=uSVuY&pf_rd_p=01fd0f51-3837-49b3-b7d3-05520a5467f4&pf_rd_r=WD4Z2MMS3XNC86G39SD4&psc=1&qid=1603446827&sr=1-1-ac3a866f-801f-44fe-9e94-bb9a271cf6b8

 

Edited October 23, 2020 by johninderby

[Pixies]

1 minute ago, johninderby said:

A SW right angle finder is a good choice.

https://www.harrisontelescopes.co.uk/acatalog/skywatcher-6x30-right-angled-erect-image-finder--bracket.html#SID=22

I’ve used one on a 100 mak but with a low profile bracket. Can be used as is or can remove the riser part with a minor mod. Replaced the stock screws with nylon ones to hold the finder. 

https://www.amazon.co.uk/Yunir-Adjustable-Astronomical-Telescopes-Sky-watcher-default/dp/B088WRYFXT/ref=sxts_sxwds-bia-wc-p13n1_0?cv_ct_cx=laser+pointer+bracket&dchild=1&keywords=laser+pointer+bracket&pd_rd_i=B088WRYFXT&pd_rd_r=4ba2878e-2ea5-4959-a9ab-1b170e9b4a62&pd_rd_w=aIu7E&pd_rd_wg=uSVuY&pf_rd_p=01fd0f51-3837-49b3-b7d3-05520a5467f4&pf_rd_r=WD4Z2MMS3XNC86G39SD4&psc=1&qid=1603446827&sr=1-1-ac3a866f-801f-44fe-9e94-bb9a271cf6b8

Do you find you need an RDF to go with it? I have trouble aligning my dob's RACI without the Telrad.

[John]

When I had a 90mm mak recently I tried both the stock RDF and a 6x30 RACI optical finder (separately) on the scope. The optical finder was more effective (plus they are a more regular tool for me) but I felt that it didn't go with the very portable / compact scope package that I was after so I got on and used the RDF making sure that it was well aligned with the scope optics and managed OK with it. I don't actually have a straight through optical finder of any sort now because I much prefer RACI's.

 

 

Edited October 23, 2020 by John

[johninderby]

A low profile bracket with the 6x30 is a must really. The stock bracket is way to tall.

Edited October 23, 2020 by johninderby