spacedog

Hi all have found a reasonably price Samyany 14 mmm lens, for sale in Park cameras Burgess hill sussex.now my question is has any body ever purchased  a item from these people ?Just need to know how reliable they are.

4 hours ago, johninderby said:

Price rises on astro gear are also hitting EU dealers now so it’s not just the UK.

Yes i have never known so many retailers to be out of stock of most things,i buy most of my bits Harrison telescopes they do not have a ot in stock at all

On 26/12/2020 at 10:37, nephilim said:

Although they are the same lens it'll possibly be due to the price at the time as these tend to fluctuate. I recently bought the Samyang 135 on Amazon, the Ronkinon 135 was around £40 more expensive.

Yep funny you say that i ordered the rokinon,inow find it is out of stock and may not be returning,waiting on money back and start over again>The Samyang on amazon has risen in price,might have a look on the second hand market in UK

I have experimented with camera on 10X zoom focused on light  few hundred yards away,but the photo come out normal size what am i doing wrong ? Ok i think i have worked this ouit the zoom is just a assist so you can focus and does not alter the lens at all. Have ordered the rokinon lens  arrives Jan7 to Jan14.I do own a telescope i have a Skywatcher 150p

ok guys thank you for info,Why out of interest did some of you choose SamYang instead of Rokinon,ok they say they are the same item just diff names.The rokinon i find is £40 cheaper.Amazon UK £302  Samyang £359

Last bit for tonight before i get in trouble.Had good look round My 40D and yes it isa zoomable X5 and X10.just need rccomended isp and shutter speed.would 30 seconds be to long ?

1 hour ago, Cosmic Geoff said:

The older Canon DSLRs are fine for day use but not user-friendly for astro use compared with newer models which have liveview etc.  Try focusing through the viewfinder on a bright star and cross your fingers.

1 hour ago, Cosmic Geoff said:

The older Canon DSLRs are fine for day use but not user-friendly for astro use compared with newer models which have liveview etc.  Try focusing through the viewfinder on a bright star and cross your fingers.

The 40D has live vbiew which i use

14 minutes ago, Alien 13 said:

The ISO depends on the camera model there is a list here as for shutter speed start with around 20-30 seconds and see how the stars look in your image.

For focusing use liveview find a star (focus must be reasonably close for this) then zoom in X10 and adjust focus so that the faint stars blink into view.

Alan

Zoom in X10 the rokinon  wide angle lens s non zoomable,and manual only ,Camera is old but adequote Canon EOS 40D

Hello every body and merry christmes to you all.Ok  i am going to purchase a Rokinon 14mm F2.8 lens.now i know this lens is manual only what i am not sure on is my camera settings on my Canon.Can some advise mo the ideal ISO ans shutter speeds please,i have never used a wide angle lens before.

6 hours ago, MarsG76 said:

Live View works in all modes....

 

7 hours ago, Matt61 said:

That doesn't really help someone who by their own admission doesn't really understand the camera. Perhaps you could run through how live view works on a 40d seeing you own one. Is it possible ( I've read online) that live view only works in one of the creative modes and not full manual.

Hi all yes i do not understand my camera fo sure,my previous hobby was making tall ships out of wood but als it turned into a to expensive hobby.i have a interest in the  sky for a long time and decided to have a go,i bought mt Skywatcher 150 of harrison telescopes and the  camers 40D second handfrom a online camera shop.All my photos previosly have been with a compact point and shoot,this is a new ballpark for and a bit confusing lol.I am sure i will get there in the end .just need some decent weather

17 hours ago, Matt61 said:

Double check your live view settings. Pay attention to exposure simulation in live view. Its all tucked away in one of the sub menus . Lens needs to be on manual focus . Make sure liveview is set in the menu. Finally it's not obvious but you don't press the shutter button to turn it on it's done via the set button ( the one in middle of large rotating ring on back ) 

Hi thanks for info must admit i am a bit lost and confused on exposure simulations,it is some thing i have not heard of before.I have googled this but they seem to explain something as if you allready understood it in part,my camera knowledge is zero in manual mode.Still wondering if i  put the focusing  think back in correctly i cant seem to focus at all now.lol i really do need the muppets guide for this.

1 hour ago, Matt61 said:

It looks like a focussing screen. They're made of hard plastic. It will go back in . Try not touch it. They come with a special tool which is effectively plastic tweezers. If you google changing canon focussing screen it comes up. I think there's video too. You haven't wrecked the camera at worst it may be scratched which you may see through the viewfinder. 

Thanks for that i googled and got it back in,bought scope in as weather closed in.Tried using camera on M with a 8 tl 55 lens  on live view,nothing appearded on screen assumingii have done job correct and not made things worse.

28 minutes ago, tooth_dr said:

Please don’t discount the 40d. I regularly used mine and @MarsG76 uses one.

Its more than adequate.

Hopefully that’s just a little focusing screen and has no bearing on functionality of the camera. 

Not sure what that part is i now find camera only works on auto,trying to focus on M and live view does not work now that bit has fell out of camera.

14 hours ago, Matt61 said:

100 is very low so no wonder you didn't see anything. The 40d goes up to around 3200 .at that level any image will be full of digital noise. Upping iso makes the camera more sensitive to light. It's largely going to be trial and error . 

Hi i have got bigger probs now tok cap of camera and a plastic bit fell out in photo enclosed think it might be game over for the 40D.Being a 76 year old pensioner i will be looking on the used canon market for some thing ,i assume most will work on scope

1 hour ago, toxic said:

you will not be able to change the aperture on the camera as your scope has no iris/aperture blades the only things you can control on the camera are - ISO  - CAPTURE TIME .

Hello toxic so basically what you are saying is the aperture is governed by the scope,no matter what i set camera on,is that correct ?

1 hour ago, Matt61 said:

Put the iso right up high to frame and focus on what you're after.via live view then adjust iso or shutter to get exposure correct. Your photos show correct mounting .I use a 7d on same scope.

Thank you Matt not sure how high my ISO goes,i used 100 ISO which way is higher low numbers or above 100 ? silly question i know still learning.

At the moment night time weather is awefull,so i am going to try to focus in daylight on a distant object.Camera settings are aperature5.6 or 11, iso 100,shutter /125.set on live view hoping the distant object will show on camera.OK took a photo of a alrm about 250 yards away,will try diff setting next time to see it will become clearer.At least i am now in the ballpark.Need a decent night now to align scope  with polaris.

3 hours ago, carastro said:

Have you tried looking at a distant land object in the daytime with the camera in the scope?  Can you get focus with that.

I have to say the DSLR does not have a tendency to show anything on live view except for the brightest stars and only when your focus is correct.  Your best bet would be to point the scope at the Moon as that is bright enough for something to show, then see if you can focus with the Moon.  Note your focus position on the draw tube and then use that position when pointing at stars and nebulae.  Nebulae are dim and unlikely to show until you have done a long exposure and even then you may have to do several and stack them together and stretch them inpost-processing.

Carole 

Yes i am going try that in daylight when weather breaks it is bit wet at the mo.

15 minutes ago, carastro said:

I used to own a 150P and could do imaging with it, I used a CCD camera but pretty sure it's previous owner used DSLR for imaging.  Mine was the Skywatcher black livery version.

I must confess I was dubious as to whether I would be able to achieve focus with it, but I was allowed to try before buying.  I also used a coma corrector with it, the baader version pushing the camera our even further. 

https://www.astrobin.com/267550/?image_list_page=4&nc=&nce=

Carole 

 

I do like that image you put up i can only dream of doing that at the moment

Ok managed to do quicky 5 photos showing how i attach camera,must admit camera leaves a lot to be desired.

37 minutes ago, Kyle Allen said:

Can you post a picture of how you’ve attached your camera?

The camera will need to be further in than an eyepiece to be able to reach focus. You might not be able to achieve focus with a DSLR with the 150P as it’s designed for visual observing. 

Yes i will do this tomorrow,al i can say is itake the eyepiece out  and attach camera direct into the 2 inch hole

36 minutes ago, Kyle Allen said:

Can you post a picture of how you’ve attached your camera?

The camera will need to be further in than an eyepiece to be able to reach focus. You might not be able to achieve focus with a DSLR with the 150P as it’s designed for visual observing. 

Yes i will do this tomorrow,al i can say is itake the eyepiece out  and attach camera direct into the 2 inch hole

Hi i have Skywatcher 150p which i am happy with,now i decided to take some photos then my problems strarted.My camera is rather old it is a canon 40D.I attached camera to view finder 2inch,set camera on M and live view but can see nothing at all on camera screen,i have no idea what i am doing wrong,any idea guys.please keep it simple.