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Old Saturday 26th March 2011, 10:48   #51
Musoman
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SW 120 ST 600mm f5
Pentax K200D
Monopod
IS off

Both birds - ISO 200 - 1/250th - Spot Meter - Centre point Focus
Woman - ISO 200 - 1/350th - Spot Meter - Centre point Focus
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Old Tuesday 29th March 2011, 01:57   #52
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Not a bird, but eating my birdseed ...

Nikon D90

Orion 80ED 600mm f/7.5 (chipped)

1/1000 sec, ISO 640

Cropped about 20% from left side, 10% from top
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Old Tuesday 29th March 2011, 21:18   #53
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One new and one from the archives

both uncropped

new
woodpecker (Dendrocopos major)
iso 250
1/500s

chaffinch
iso 100
1/320s

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Old Tuesday 29th March 2011, 22:54   #54
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A few from last weekend

A few more with the TL APO804.

All except the second with the kenko Pro300 1.4x at ISO500 1/1250 F/8.4.
The second was with the kenko Pro300 2x at ISO500 1/800 F/12.

The last is a 100% crop from the second photo.
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Old Wednesday 30th March 2011, 19:17   #55
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Very beautiful, Fernando. That 100% crop from the second shot with a 2X teleconverter is simply amazing.

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Old Friday 1st April 2011, 02:29   #56
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Celestron 80 ED + GSO 2" 2X Barlow
Nikon D40
1/250 sec
ISO 400

Red-winged Blackbird (male)
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Old Friday 1st April 2011, 21:18   #57
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Some pictures

1. Numenius Arquata - Eurasian Curlew
1/800
ISO 200

2. Circus Aeruginosus - Western Marsh Harrier (female)
1/800
ISO 200

3. Saxicola Torquata - African Stonechat (male)
1/800
ISO 200

4. Vanellus Vanellus - Lapwing
1/800
ISO 200

5. Circus Aeruginosus - Western Marsh Harrier (female)
1/500
ISO 200
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Old Saturday 2nd April 2011, 09:08   #58
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Took this yesterday. A Crow showing partial leucism (lack of pigment).

Crow
Camera : Canon 450D
Scope : Skywatcher 80ED
ISO800
1/200s
Sunagor 100-200mm telenegative (1.5X on scope).
Image uncropped.
Range approx 30m (100 feet).
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Old Saturday 2nd April 2011, 09:38   #59
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Example showing how well low magnification telenegatives/TC's stack up together.

First image is just at 1.5X mag with Sunagor 100-200mm telenegative.

Second image is with Kenko Pro 1.4X TC, Sunagor 1.5X TN and Prinzflex 1.5X TN all stacked together.

Due to the gap between the two TN's the first one was probably providing around 1.6X or even 1.7X. Overall magnification would have been around 3.3X or nearly 2000mm not including crop factor.

Distance to cat was around 15 to 20m (50 - 65 feet).

Skywatcher 600mm 80ED
Canon 450D

1st image ISO 800 1/125sec
2nd image ISO 800 1/60sec

Both images are uncropped.

Dull and overcast.
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Old Saturday 2nd April 2011, 16:12   #60
bluedubius
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Quote:
Originally Posted by Paul Corfield View Post
Example showing how well low magnification telenegatives/TC's stack up together.

First image is just at 1.5X mag with Sunagor 100-200mm telenegative.

Second image is with Kenko Pro 1.4X TC, Sunagor 1.5X TN and Prinzflex 1.5X TN all stacked together.

Due to the gap between the two TN's the first one was probably providing around 1.6X or even 1.7X. Overall magnification would have been around 3.3X or nearly 2000mm not including crop factor.

Distance to cat was around 15 to 20m (50 - 65 feet).

Skywatcher 600mm 80ED
Canon 450D

1st image ISO 800 1/125sec
2nd image ISO 800 1/60sec

Both images are uncropped.

Dull and overcast.
Boy, that is just amazing, Paul. That looks as sharp as what I might get sticking my Nikkor 50mm f1.8 right up in that cats face. Razor sharp and relatively inexpensive...what more could you ask for!

Rick
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Old Saturday 2nd April 2011, 16:16   #61
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Tree Swallow from this morning, taken while I was at the marsh photographing Red-winged Blackbirds.

Celestron 80ED 600mm f7.5 refractor
Nikon D40
ISO 400 1/640 sec
distance - around 30 feet

cropped, levels, and sharpening in photoshop 6
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Old Sunday 3rd April 2011, 10:50   #62
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Well, managed to get out early yesterday and today for some test shots with the SW 80ED and Pentax K5.
Trying all sorts at the moment to get the feel of this setup but liking it so far. The first Grebe shot is a heavy crop, so I could test the image quality, the second Grebe shot was a little closer, as was the female mallard.
Then I added a Kenko 1.5x TC for the Tufted Duck, again to test image quality at a distance and it is also a heavy crop. The final shot was also at 900mm (scope + 1.5x TC) across the reservoir to the far side and is full size image, no cropping, and measured on Google Earth is a distance of about 330 Metres.
I think I am going to like this combo for static location shooting.
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Old Sunday 3rd April 2011, 19:50   #63
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Cardinal

A Cardinal from today.

Nikon D90

Orion 80ED 600mm f/7.5 (chipped) with 1.6 Vivitar TN

1/500 sec, ISO 800

Cropped to roughly square format.
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Old Sunday 3rd April 2011, 22:49   #64
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A few more kingfisher shots from the same shoot. The exif is the same only the setting have changed. All with the 1.4x TC except the third witch I use the 2x TC.

And a 100% crop from the first photo, warning 800Kb:
http://fernandobatista.smugmug.com/p...31_aVt7A-O.jpg
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Old Monday 4th April 2011, 08:40   #65
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First class as always Fernando.

Playing with my two 1.5X TN's at the weekend. One from the Sunagor 100-200mm and the other from the Prinzflex 100-200mm zoom.

Range to target is in the region of 90m (295 feet or 98 yards)

First image was at 1.5X (900mm) with just one TN mounted close to camera. Photo uncropped.

Second image also uncropped - 30mm macro tube on camera - 1.5X TN - 2nd 30mm macro tube - 1.5X TN. This combination gives around 3.5X on the scope or around 2100mm before crop factor.

SW80ED - Canon 450D
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Old Monday 4th April 2011, 15:52   #66
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Is stacking TN's the same as moving just one TN further from the camera mount ?

I was thinking about all that glass being added to get 3.5x
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Old Monday 4th April 2011, 18:08   #67
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Quote:
Originally Posted by Musoman View Post
Is stacking TN's the same as moving just one TN further from the camera mount ?

I was thinking about all that glass being added to get 3.5x
It's not much glass at all. Stacking two TN's to get 3.5X equals only 4 elements of glass because each TN is a doublet. I've found the TN's from 100-200mm zooms seem to be mostly doublets.

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Old Monday 4th April 2011, 18:39   #68
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Despite that, its still double the elements of one TN, so would you not get slightly better IQ by moving one TN further out with a tube, or do they degrade as they get further from the sensor ?
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Old Monday 4th April 2011, 23:13   #69
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I'll try it in the morning but I doubt one 1.5X TN would ever reach 3.5X by adding in a long macro tube. Initially you gain a good jump by adding in say a 30mm or a 60mm macro tube. After that the magnification tapers off and you don't gain a great deal more.

As well as the number of elements, for image quality what is also important is the quality of the coatings and the polish of the glass. The 1.5X perform very well on their own and stacking a couple together seems to be better than using the higher power TN's.

I'm sure there's better TN's out there as I've only been able to get hold of budget brands so far.

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Old Tuesday 5th April 2011, 00:45   #70
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Them budget brands are doing very well it seems

Both the Soligor & Prinzflex are revealing some good quality. I have a Prinzflex 100-200, but this might be like putting Lester Piggot on a donkey when fitting to my 120 SW
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Old Thursday 7th April 2011, 10:32   #71
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Hoverfly
Camera : Canon 450D
Scope : Skywatcher 80ED
ISO800
1/250s
Canon 80-200mm telenegative (about 1.7X on scope).
Image cropped, only about 20 off two sides.
Range approx 6m (20 feet).
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Old Thursday 7th April 2011, 17:42   #72
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Some more from today, All at about 30ft

Camera: Samsung GX-20
Lens: Skywatcher ED80


Bullfinch
ISO : 800
Shutter : 1/1000

Chaffinch
ISO : 800
Shutter : 1/250

Greenfinch
ISO : 800
Shutter : 1/250

Crops at 100%
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Old Saturday 9th April 2011, 10:39   #73
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Here are 3 from this morning's early morning sortie using the SW 80ED. All shot from within a bird hide at Wilstone reservoir. The two Grebe shots are uncropped, full image at 600mm.

One thing I have noticed, is that maybe the focus when using the camera focus confirm may be a little off. I'll have to set up a target somewhere and do some tests, see if maybe the focus micro adjust brings it into focus better.
These three shots were all manual focus without using focus confirm.

Some difficult lighting as well, especially on the two Grebe shots as the sun was beating down reflecting off the water close and the Grebe moved into a more shady spot. Peased with the results though.
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Old Sunday 10th April 2011, 00:47   #74
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SW 120mm f5 ST + Prinzflex 100-200mm TN ( 1.5x )

900mm FL

All @ ISO 200

1 + 2 @ 1/250
3 + 4 @ 1/500

Wild Pheasant
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Old Sunday 10th April 2011, 00:51   #75
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SW 120mm f5 ST @ 600mm

All @ ISO 200
All @ 1/750

Slavonian Grebe
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