For years now, with my 17.5" f/4.5 dob, I have been using a taller three-step platform step ladder (see first pic). I am not the tallest fellow so the ladder is not just for outreach but for me too.
For all my other scopes, I have been using a shorter three-step platform step ladder (second pic) - not for me (I am not THAT short...) but for kids.
What both of these have in common is their deep steps which gives greater sure-footedness to people using it and the tall grab handle. Both of these features are very important not just for comfort (you do a greater effort on a narrow step to stay on it and if you are using it, it creates fatigue very quickly & is less stable for the user) and you & outreach attendees have something stable to hold on to that is not the scope. The tall handle is far more important than you may think for stability in the dark.
At outreach, I ALWAYS have the steps illuminated with a red light. NO EXCUSES. Having a visual reference in the dark while up a ladder is extremely important.
Ladders are always dangerous, and even more so in the dark. Providing a pissy little step up is NOT a help but a liability for the person on it and the gear. Do not make cost a prime priority in ladder selection. SAFETY MUST COME FIRST, if not for outreach attendees but for you too. Sure there are cheaper step ladders and ladders that are more compact, but in the dark you need to give yourself and your guests the best sense of safety possible. If you up just on a simple step up ladder, you are at much greater risk of losing balance, at greater risk of making a grab for the scope if you do lose balance or worse still have nothing to grab if you do lose balance and fall in the dark. Even worse if it is a guest.
At one major star party a few years ago, one participant brought along a 28" f/5 dob. TALL sucker. The scope was set up in the "visual field" which was kept particularly dark and the owner of the scope refused to put any form or illumination on the very tall, narrow & tapering ladder. With absolutely no visual cues for safety I refused to go up in the dark. It would have been the largest aperture I would have looked into, but it was not safe. My good friend did go up, even though I expressed my concerns. Guess what? He fell off the blasted thing while the scope was up close to zenith! No visual references in the dark, high altitude on the narrow ladder from which he was leaning over to look into the scope and he lost balance. People made fun of me for refusing to look through that scope, but the danger was way too great a risk and my friend paid the price.
Even with my own 17.5" scope, I have had occasions when I have forgotten where I was and stepped off without thinking and got the shock of my life when the ground wasn't where it was supposed to be. If you are using a step ladder with outreach, YOU MUST stay with the person up on the ladder, standing beside them for when they are about to step down. NEVER leave someone alone on your ladder.
If the person is a kid, FIRST ask the parent if it is ok for you to grab/hold/lift the child before they step up. You need to ask this not just to help them up the ladder & for safety reasons but you may also need to help the child to position their head over the eyepiece.
Alex.
Edited by maroubra_boy, 16 October 2023 - 05:14 PM.