Olympus UK E-System User Group
Olympus UK E-System User Group

Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


Go Back   Olympus UK E-System User Group > Show your photos > Foto Fair

Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

Reply
 
Thread Tools Display Modes
  #196  
Old 18th January 2019
OM USer's Avatar
OM USer OM USer is offline
Full member
 
Join Date: Jun 2012
Location: London
Posts: 11,675
Thanks: 2,284
Thanked 1,466 Times in 1,394 Posts
Likes: 5,956
Liked 1,367 Times in 872 Posts
Re: Communal Night-Sky Photography Thread

Nice and crisp Mike.
__________________
Cameras: E-M5, E-PM2, OM40, OM4Ti
Lenses (M.Zuiko Digital): 7-14mm/F2.8, 12-40mm/F2.8, 40-150mm/F2.8+TC1.4x, 12-50mm/F3.5-6.3, 14-42mm/F3.5-5.6 EZ, M.ZD 40-150 F4-5.6 R, 75-300mm/F4.8-6.7 Mk1, 12mm/F2, 17mm/F1.8
Lenses (OM Zuiko): 50mm/F1.2, 24mm/F2, 35mm/F2.8 shift
Lenses (OM Fit): Vivitar Series II 28-105mm/F2.8-3.8, Sigma 21-35mm/F3.4-4.2, Sigma 35-70mm/F2.8-4, Sigma 75-200mm/F2.8-3.5, Vivitar Series II 100-500mm/F5.6-8.0, Centon 500mm/F8 Mirror
Learn something new every day
Reply With Quote
The Following 2 Users Say Thank You to OM USer For This Useful Post:
MikeOxon (18th January 2019), MJ224 (18th January 2019)
The Following User Liked This Post:
MJ224 (18th January 2019)
  #197  
Old 29th January 2019
MikeOxon MikeOxon is offline
Full member
 
Join Date: Nov 2017
Location: oxford
Posts: 500
Thanks: 45
Thanked 84 Times in 73 Posts
Likes: 54
Liked 197 Times in 127 Posts
Re: Communal Night-Sky Photography Thread

After having found both the 17mm f/1.8 and 45mm f/1.8 to be very useful in low light situations, I decided to add the 75mm f/1.8 to my collection, especially since it has a very high reputation amongst Olympus lenses.


Noticing a clear sky yesterday evening, I decided to try the lens out by photographing the Pleiades cluster, which was almost overhead in the early evening.


Results at f/1.8 were very good although some coma was evident towards the corners. Stopping down to f/2.8 provided excellent results across the whole frame.


The whole frame coverage is shown below, followed by a crop of the Pleiades:





__________________
Mike
visit my Natural History Photos website:
http://home.btconnect.com/mike.flemming/
Reply With Quote
The Following Users Liked This Post:
Greytop (29th January 2019), OM USer (30th January 2019)
  #198  
Old 30th January 2019
MJ224's Avatar
MJ224 MJ224 is offline
Full member
 
Join Date: May 2016
Location: Carmarthenshire
Posts: 11,888
Thanks: 802
Thanked 612 Times in 570 Posts
Likes: 5,882
Liked 3,184 Times in 1,481 Posts
Re: Communal Night-Sky Photography Thread



Andromeda Galaxy
by Mark Johnson, on Flickr

Mike, your photos inspired me to make a poor shot of the Andromeda galaxy. Work in progress I think. We do have fairly bad local street lights is my excuse...……

56mm, ISO 2500 F4, 4 seconds....
__________________
My Sailing Page

My Flickr
Reply With Quote
  #199  
Old 30th January 2019
MJ224's Avatar
MJ224 MJ224 is offline
Full member
 
Join Date: May 2016
Location: Carmarthenshire
Posts: 11,888
Thanks: 802
Thanked 612 Times in 570 Posts
Likes: 5,882
Liked 3,184 Times in 1,481 Posts
Re: Communal Night-Sky Photography Thread



Mirach, Mu And + Andromeda galaxy
by Mark Johnson, on Flickr

Just a slightly better processed view of the three stars/galaxy. Processed in Faststone, will have to work out why its better than Lightroom (process that is)..
__________________
My Sailing Page

My Flickr
Reply With Quote
  #200  
Old 30th January 2019
Phill D's Avatar
Phill D Phill D is offline
Full member
 
Join Date: Apr 2011
Location: Derbyshire
Posts: 9,490
Thanks: 1,149
Thanked 1,361 Times in 1,256 Posts
Likes: 952
Liked 2,208 Times in 1,056 Posts
Re: Communal Night-Sky Photography Thread

Well got up at 6:30 to shoot the Moon with Venus and Jupiter. Manual focus, peaking and magnify set plus exposure set, iso adjusted, hand held but using the best IS in the business, sky was clear to start then clouds came in but then it cleared perfectly. So well prepared with the gods all aligned...or so I thought! images mainly pretty rubbish? guess what I'd done when I looked at the images...? 12-100 lens IS was switched off! so most of what I got are bright sharp squiggles Moral of the tale is get up 10 minutes earlier than you need to and have a coffee! Might go back to bed now!
Reply With Quote
  #201  
Old 30th January 2019
MikeOxon MikeOxon is offline
Full member
 
Join Date: Nov 2017
Location: oxford
Posts: 500
Thanks: 45
Thanked 84 Times in 73 Posts
Likes: 54
Liked 197 Times in 127 Posts
Re: Communal Night-Sky Photography Thread

Commiserations, Phil. Those slide switches on the side of lenses seems to have a habit of switching themselves 'off' ! I have got into a routine of checking the switches on my 100-400mm after attaching it to the camera - except when I forget
__________________
Mike
visit my Natural History Photos website:
http://home.btconnect.com/mike.flemming/
Reply With Quote
The Following User Liked This Post:
Phill D (30th January 2019)
  #202  
Old 30th January 2019
MikeOxon MikeOxon is offline
Full member
 
Join Date: Nov 2017
Location: oxford
Posts: 500
Thanks: 45
Thanked 84 Times in 73 Posts
Likes: 54
Liked 197 Times in 127 Posts
Re: Communal Night-Sky Photography Thread

MJ224’s comment, above, set me thinking about the effects of using different Raw Converters so, being of an experimental turn of mind, I decided to put the raw data of my Pleiades shot, shown in my earlier post above, through various software packages that I happen to have.

To show what I could expect to see, I looked at the appropriate area of sky with the ‘Stellarium’ planetarium software, set for a high level of light pollution, appropriate to my urban environment.


Stellarium image

To start with, I processed my data with the new Olympus Workspace software. To allow comparison between the various converters, I displayed the image that each one produced on my screen at 200% magnification and took a screen grab. I then cropped the same area of sky from each image, as shown below:



Image processed with Olympus Workspace

The program ‘Raw Therapee’ is unusual in that it allows the user to select from several different conversion algorithms. These ‘de-mosaicing’ algorithms are all described in https://rawpedia.rawtherapee.com/Demosaicing

Astrophotography is probably not the main consideration when developing most de-mosaicing algorithms but the Rawpedia link suggests that RCD (Ratio Corrected Demosaicing) does an excellent job for round edges, for example stars in astrophotography. So, I tried that one next, using RawTherapee:


Image processed by RawTherapee - RCD algorithm

When working with very noisy, high ISO images, Rawpedia recommends using the LMMSE (linear minimum mean square-error estimation) or IGV demosaicing methods. These are said to prevent false maze patterns from appearing, and prevent the image from looking washed-out due to heavy noise reduction. I tried them both and the results looked extremely similar. The following image is made using LMMSE:


Image processed by RawTherapee - LMMSE algorithm

The default algorithm in RawTherapee is AMaZE (Aliasing Minimization and Zipper Elimination), as it claimed to yield the best results in most cases. The result on my image follows:


Image processed by RawTherapee - AMaZE algorithm

There is a fast algorithm that is not recommended in RawTherapee other than for batch processing, to compare several images. The ‘Fast’ method should not be used for the final conversion, as it is a low-quality algorithm for display purposes. The result on my image follows:


Image processed by RawTherapee - Fast algorithm

Finally, a couple of examples from commercial raw converters. I usually use DxO Optics Pro 11 because I find it provides a good result and has several useful tools for optimising an image:


Image processed using DxO Image Pro 11

I have also used Corel AfterShot 3, which is a very fast converter but I was never happy with the results:


Image processed by AfterShot Pro3

My opinion is that the Olympus Workspace produced a result that represents the stars very well, if a little soft. DxO Optics Pro has produced a grittier result, superficially sharper but with several artefacts, which has made some stars appear as doubles, when Stellarium confirms that they are not. The AMaZE algorithm has also produced some strange cup-shaped stars. The worst results are from the Fast algorithm and AfterShot Pro3, which have both introduced a lot of false colours and other artefacts.

Remember that the original image was far from perfect, being taken in an area with high light pollution and, of course, general atmospheric disturbance.
__________________
Mike
visit my Natural History Photos website:
http://home.btconnect.com/mike.flemming/
Reply With Quote
The Following User Says Thank You to MikeOxon For This Useful Post:
OM USer (31st January 2019)
The Following Users Liked This Post:
Greytop (30th January 2019), MJ224 (30th January 2019), wornish (19th April 2019)
  #203  
Old 12th February 2019
wornish's Avatar
wornish wornish is online now
Senior Member
 
Join Date: Sep 2015
Location: Cheshire
Posts: 5,375
Thanks: 310
Thanked 483 Times in 370 Posts
Likes: 2,474
Liked 1,414 Times in 693 Posts
Re: Communal Night-Sky Photography Thread

Quick go last night.
Hand Held. 300mm + 1.4TC , ISO400, 1/500th sec f/5.6

__________________
Dave

My Flickr
Reply With Quote
The Following Users Liked This Post:
Gate Keeper (18th February 2019), Greytop (12th February 2019), MJ224 (12th February 2019), OM USer (12th February 2019)
  #204  
Old 12th February 2019
Greytop's Avatar
Greytop Greytop is offline
Senior Member
 
Join Date: Jan 2008
Location: Berkshire, UK.
Posts: 6,554
Thanks: 1,129
Thanked 608 Times in 556 Posts
Likes: 1,607
Liked 870 Times in 308 Posts
Re: Communal Night-Sky Photography Thread

Nice shot Dave, looks like there are some weird hatching artifacts on the surface there.
Maybe the 'Moon' film for real (Sam Rockwell etc)
__________________
Regards Huw


Olympus equipment (mainly)
Capture One Pro
My flickr
Reply With Quote
  #205  
Old 12th February 2019
wornish's Avatar
wornish wornish is online now
Senior Member
 
Join Date: Sep 2015
Location: Cheshire
Posts: 5,375
Thanks: 310
Thanked 483 Times in 370 Posts
Likes: 2,474
Liked 1,414 Times in 693 Posts
Re: Communal Night-Sky Photography Thread

Quote:
Originally Posted by Greytop View Post
Nice shot Dave, looks like there are some weird hatching artifacts on the surface there.
Maybe the 'Moon' film for real (Sam Rockwell etc)
You are not supposed to see them

I think I overdid the de-convolution trying to get more detail.
I tried to remove the artifacts by reducing noise but it didn't quite work.

I used an app called Astra Image which has some enhancing tools but as usual less is more. I can't resist pushing an image beyond its limit.

The only way to make handheld moon shots work for me is to use shutter speeds of a 1/1000th sec or even shorter.

Using a tracking mount makes a huge difference when at these long focal lengths.
__________________
Dave

My Flickr
Reply With Quote
The Following User Liked This Post:
Greytop (12th February 2019)
  #206  
Old 13th February 2019
Phill D's Avatar
Phill D Phill D is offline
Full member
 
Join Date: Apr 2011
Location: Derbyshire
Posts: 9,490
Thanks: 1,149
Thanked 1,361 Times in 1,256 Posts
Likes: 952
Liked 2,208 Times in 1,056 Posts
Re: Communal Night-Sky Photography Thread

I thought you'd used some sort of canvas type effect ready for printing large
Reply With Quote
The Following User Liked This Post:
wornish (13th February 2019)
  #207  
Old 14th February 2019
MJ224's Avatar
MJ224 MJ224 is offline
Full member
 
Join Date: May 2016
Location: Carmarthenshire
Posts: 11,888
Thanks: 802
Thanked 612 Times in 570 Posts
Likes: 5,882
Liked 3,184 Times in 1,481 Posts
Re: Communal Night-Sky Photography Thread


About 20 photos stacked in Registax...
__________________
My Sailing Page

My Flickr
Reply With Quote
The Following Users Liked This Post:
Gate Keeper (18th February 2019), Greytop (15th February 2019), OM USer (15th February 2019), wornish (15th February 2019)
  #208  
Old 15th February 2019
Greytop's Avatar
Greytop Greytop is offline
Senior Member
 
Join Date: Jan 2008
Location: Berkshire, UK.
Posts: 6,554
Thanks: 1,129
Thanked 608 Times in 556 Posts
Likes: 1,607
Liked 870 Times in 308 Posts
Re: Communal Night-Sky Photography Thread

Ha ha, I was at it too Mark...

One with the G9
Moon by Huw Prosser, on Flickr

And one with the E-M1 MkII
Moon by Huw Prosser, on Flickr

Both with with the Tokina 300 f/2.8 and three stacked converters.
The G9 has come out a bit better but that's no reflection on the camera body. It's basically down to atmospheric conditions and slight breeze etc
__________________
Regards Huw


Olympus equipment (mainly)
Capture One Pro
My flickr
Reply With Quote
The Following Users Liked This Post:
Gate Keeper (18th February 2019), MJ224 (15th February 2019), OM USer (15th February 2019), wornish (15th February 2019)
  #209  
Old 15th February 2019
MJ224's Avatar
MJ224 MJ224 is offline
Full member
 
Join Date: May 2016
Location: Carmarthenshire
Posts: 11,888
Thanks: 802
Thanked 612 Times in 570 Posts
Likes: 5,882
Liked 3,184 Times in 1,481 Posts
Re: Communal Night-Sky Photography Thread

Could say "SNAP" Huw,...……………..

Nice photos...…...
__________________
My Sailing Page

My Flickr
Reply With Quote
The Following User Liked This Post:
Greytop (15th February 2019)
  #210  
Old 15th February 2019
wornish's Avatar
wornish wornish is online now
Senior Member
 
Join Date: Sep 2015
Location: Cheshire
Posts: 5,375
Thanks: 310
Thanked 483 Times in 370 Posts
Likes: 2,474
Liked 1,414 Times in 693 Posts
Re: Communal Night-Sky Photography Thread

Both very nice and a lot better than my handheld moon effort.

I was out last night with my scope for the first time this year.
This is about 1 hour total worth of capture time using narrowband filters R, G and B to try and cut through the moonlight.
Can just about see The Running Man top centre.

Orion Nebula - M42


__________________
Dave

My Flickr

Last edited by wornish; 17th February 2019 at 07:57 AM. Reason: replaced faulty image
Reply With Quote
The Following Users Liked This Post:
Gate Keeper (18th February 2019), Greytop (15th February 2019), OM USer (17th February 2019), Phill D (16th February 2019), skids (16th February 2019)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Communal Dragonfly, Butterfly and Insect photo thread art frames Foto Fair 2631 17 Hours Ago 10:16 PM
Communal Bird Photography Thread Olybirder Foto Fair 2099 23 Hours Ago 05:03 PM
Communal flowers, trees, plants and fungi thread art frames Foto Fair 931 2 Days Ago 11:58 AM
Night photography Cas69 The lounge 1 21st August 2017 06:11 AM
Night Photography ChrisW Foto Fair 13 10th December 2009 04:18 PM


All times are GMT. The time now is 04:03 PM.


© The Write Technology Ltd, 2007-2019, All rights reservedAd Management plugin by RedTyger