neil phillips

looks tighter doesn't it. some shading showing

Should have got one a long time ago😉

Very nice W47 is often lower contrast. But it looks nicely balanced

Hi Chrissy if you ever want to know something start a thread, or message. I am sure someone can help. Welcome to the forum.

Good question. But coming from Anthony Wesley. its likely correct. But of course one could ask how much did he try the other filters ? And of course better signal to noise. with the shorter than 1000nm. but is that less of a hindrance. Noise can be controlled with more frames

Seems to suggest 850nm will have higher contrast no ?

Your doing exactly the right thing. getting on it as early as possible. Where seeing is likely going to be best. Even in my high location its getting dark before i can get on it. Let alone focus and everything else. thats whats good about the morning return. rising into better seeing until too faint. I cant be certain. i haven't tested these filters with a 8" Its been sometime since i had a 742. Do more research. CN or where ever. Personally i think you would get away with 850nm. But dont hold me too it. If it helps here's what Anthony wesley says. Was just looking for opinions to get a sense of how much IR detail you can expect to see with a 1000nm filter. I've tried other filters as well, eg 850nm longpass and 750nm longpass, they certainly work but the contrast is lower.

Yes i suspected as much. haven't looked into it. but damn the 178, is pretty low down isnt it. its awkward, because mono will do better in UV. But the the 462c better in IR. using a filter wheel i don't fancy changing cameras to do any combination. so stuck with the 178 for any false color. That's a very kind offer Kon. But i have a 462c here. Your a gentleman. much appreciate the generosity. I don't think i am going to do well. until Venus enters the morning, i am learning all the time. I have two choices. Two or three captures as it starts to get dark around 26 degrees and falling. 3 short captures in and it hits a roof lol. Or setup in the other location. I get longer But by the time it clears the tree, its dropping to 22 degrees and falling. Its a waste of time for real quality i cant work with that. The one thing you need with venus is get on it early ( so its high ) and work at it for 20 mins or so. I am just snatching in one location. and its too low in the other. I may keep a eye on how its behaving under good seeing the low location is likely better at least i dont lose it quickly. But as spring progresses the tree will get broader. even more trouble so. Yeah i am not in the ball park i don't think at this location. But will watch watch you guys are doing. Everyone is doing great.

Much appreciated Mark

yes i thinker bolder sharpening would likely work better. Can see some subtle shading. I am going to try 610nm 685nm and 850nm. See what's going on here. Kon is using 685. And seems to be getting quite some definition. from what I've seen deeper is often better. Maybe its a seeing thing. But worth experimenting none the less. Good capture with the poor seeing

Ive seen the Astronik 742. £44 new so secondhand wouldn't be too bad. Wouldn't mind one myself actually. The gap between 685 and 850 nm. Yes i am sure your right newer cameras are helping. A good question for you Kon. what do you think of a shootout between IR 850 with a colour 462c or mono 178. I am thinking the colour will do better because. at 850 it essentially becomes monochromatic. Its more sensitive in IR what's your thoughts ? IR does better with larger optics and thermal issues. So yes your right i should probably try at 850 nm. weathers gone all silly again.

Yes longer wavelengths tend to do better on Venus. The best i had ever seen was taken with large optics at 1000nm impossible for a 8" scope. I am unsure how deep you can go with 8 " optics. but 742 might be worth trying. I should try 850 nm with the 12" if i get the chance. I am surprised your picking anything up, at those wavelengths. But you say its visible before stretching. It certainly looks to me like you are. What's likely helping is your consistently good focus I dont have a single IR at 742. but here was a combined 742 and UV from 2012 Orion.

Good catch between the clouds coming. I cant answer the IR question, as i haven't been following what is being picked up. Out of interest what wavelength are you capturing with IR ?

Cheers Pete it was very rushed. I didn't start setting up until i should have already been imaging. Will be disappointed, if i cant improve on this considerably quite soon.

lol got some of my best stuff oversampled. Rules can be bent. Was more a observation of wanting to perhaps go longer myself after seeing how good it was.

What's also interesting is your considerably oversampled F24, F12 would seem closer to optimum. But doesn't appear to have hurt the result. Makes me think i will experiment with different focal lengths. Starting from optimum and moving up. With Venus small size its certainly helping my old eyes pick out the details.

Its really a moving target isn't it. I am wondering what its going to do next actually.

I have three scopes left now Orion 245mm. Stella lyra 8" (7.3") Classical Cassegrain. And 12 " stella lyra dob. can see how i could confuse people.

Cheers hopefully better will be coming. Not sure if i can use this filter wheel. here. I hope so, do a false color image. Thought i remember last time i tried having problems, but we shall see

Know exactly what you mean, i had to breakdown the whole setup and shift it 12 feet to the left. And it was already getting dark. The joys of low targets

Very nice the advantage of larger scopes very apparent.

Still some nice detail there

Good colour capture.

It was a F12 Classical Cassegrain On a EQ mount. But cheers

Noise on Venus is a no no. Yeah its one of those things. you can stay dust free for ages. Then you jolt the camera, drop it even on a bed. it jolts dust onto the chip ( or can i should say ) My lunar imaging is too important to risk, the hassle. For some UV gain. its just a personal choice. Hope my Orion mirror cleans up there is something on there. Just hope when i clean it. i don't get to a situation of a recoat. We shall see. But the Orion should do better on Venus I've seen what it can do. great the Stella lyra for a quick rushed setup though. couldn't do that with the Orion. it all has to be planned.