[Johndm]

Two more from the 'ol 100-400 L taken today.

Difficult lighting with a diffuse cloud layer....

First, a Wonky Landing,

Second, Michael Howard Tory leader leaving Cranfield in the campaign chopper after visiting Milton Keynes this afternoon...

You won't see it in this reduced image, but he's looking out of the rear window...

Helicopter could have done with a longer exposure so you are not freezing the rotors.

[HotblackDesiato]

I quite like as is... perceptible movement...not complete frozen, not a blur.

[DJW]

Originally Posted by Johndm

Second, Michael Howard Tory leader leaving Cranfield in the campaign chopper after visiting Milton Keynes this afternoon...

You won't see it in this reduced image, but he's looking out of the rear window...

he's looking out the window thinking "Jesus that guys pointing a bazooka at us " ....

Very sharp shots.

Originally Posted by tyefi

I quite like as is... perceptible movement...not complete frozen, not a blur.

It just looks to me like it's suspended from a crane. There's not enough sense of dynamic for my liking.

[Johndm]

Originally Posted by DJW

he's looking out the window thinking "Jesus that guys pointing a bazooka at us " ....

Very sharp shots.

LOL....

I seem to get far more anxious looks from pilots these days...

It seems the White Drainpipe is much more noticable from the air than my old skinny black job..

[Johndm]

Originally Posted by mighty_boosh

Helicopter could have done with a longer exposure so you are not freezing the rotors.

Ahhh.....a new aviation photog specialist?

As I said, these were under difficult conditions, as the hazy cloud plays all sorts of havoc with exposure, as it acts like a massive diffuser.

Needed to be up at 1/500th, as lens was at max 640mm zoom. Was experimenting to see what aperture resulted with Exposure Compensation +2/3, ISO upped to 200.

Exif below...

Have a look here if you like aircraft......

http://www.airliners.net/search/phot...nct_entry=true

File Name
IMG_5792.JPG
Camera Model
Canon EOS 300D DIGITAL
Shooting Date/Time
22/04/2005 16:42:12
Shooting Mode
Shutter-Priority AE
Tv( Shutter Speed )
1/500
Av( Aperture Value )
10
Metering Mode
Evaluative Metering
Exposure Compensation
+2/3
ISO Speed
200
Lens
100.0 - 400.0 mm
Focal Length
400.0 mm
Image Size
3072x2048
Image Quality
Fine
Flash
Off
White Balance Mode
Auto
AF Mode
AI Focus AF
Parameters Settings
Contrast Mid. High
Sharpness Mid. High
Color saturation Mid. High
Color tone 0
Color Space
sRGB
File Size
1695 KB
Drive Mode
Continuous shooting

Regards

Originally Posted by Johndm

Ahhh.....a new aviation photog specialist?

Not really a specialist, just enjoy photography. I've recently been able to afford a DSLR, up to now I've been film except for my digital compact.

I think it may have been possible to get away with stopping the shutter down to 1/320 with an apperture of f8. I know the rule of thumb is shutter speed greater than focal length to avoid camera shake, but I have regularly gotten away with 1/200 at 300mm. I'm not sure whether it is correct or not to take the 1.6 factor into account when using that rule, so 1/320 won't be that far off at 400mm.

[condyk]

I think the first pilot is drunk and like the second shot, but agree it could have done with some extra dynamism ideally. Super sharp tho'.

[mr jones]

Tory leader?????

the second shot could really have done with a fireball (the tory-choper) making contact with the blair filled labour bus, NOW THAT WOULD BE A SHOT AND A HALF!

bet you howard would still be moaning about blair lying, and tony blair would be real pissy cuz yet another person had mentioned the war....

[condyk]

Originally Posted by mr jones

the second shot could really have done with a fireball (the tory-choper) making contact with the blair filled labour bus, NOW THAT WOULD BE A SHOT AND A HALF!

Have you been celebrating PNE in the play offs already still a point to get!!!

[Johndm]

Originally Posted by mighty_boosh

Not really a specialist, just enjoy photography. I've recently been able to afford a DSLR, up to now I've been film except for my digital compact.

I think it may have been possible to get away with stopping the shutter down to 1/320 with an apperture of f8. I know the rule of thumb is shutter speed greater than focal length to avoid camera shake, but I have regularly gotten away with 1/200 at 300mm. I'm not sure whether it is correct or not to take the 1.6 factor into account when using that rule, so 1/320 won't be that far off at 400mm.

Panning needs to be spot on perfect to get a good amount of keepers at 1/320, although IS does do a good job sometimes...still need to be smooth though..

1.6 crop needs to be added, so I'm panning at 640mm with the chopper shot, even with IS, 1/320 is gonna be risky, especially as I wanted the shot, so 1/500 gave me a dead cert.

I'll be at Old Warden next Sunday, the display line will be much closer, so will be attempting to get the Spitfire in flight at 1/90 while panning.....IS on of course.

[mr jones]

PNE? oh yeh thats football, not interested in footy at all

Originally Posted by Johndm

1.6 crop needs to be added, so I'm panning at 640mm with the chopper shot, even with IS, 1/320 is gonna be risky, especially as I wanted the shot, so 1/500 gave me a dead cert.

I'm really not sure you need to take into account the 1.6 crop because it is not changing the properties of the lens, it's as if you were taking a full frame image and just ignoring the outer edges - the amount of shake will be unchanged.

[HotblackDesiato]

Originally Posted by mighty_boosh

I'm really not sure you need to take into account the 1.6 crop because it is not changing the properties of the lens, it's as if you were taking a full frame image and just ignoring the outer edges - the amount of shake will be unchanged.

I always figured the 1/focal length guide was based around noticeable "shake" for a given field of view. And that as such you'd probably want to use 35mm equivalent focal lengths to preserve the rule, as moving to the smaller sensor you'd effectively narrowed the fov?

Anyway i agree the 1/focal length guide is just that a rough guide.

Originally Posted by tyefi

I always figured the 1/focal length guide was based around noticeable "shake" for a given field of view. And that as such you'd probably want to use 35mm equivalent focal lengths to preserve the rule, as moving to the smaller sensor you'd effectively narrowed the fov?

Anyway i agree the 1/focal length guide is just that a rough guide.

Yes you are right, if you are printing a full frame image at 10x8 and a 1.6 crop image at 10x8 then the 1.6 image needs to be enlarged more (assuming the sensor has the same density of pixels/cm), so any camera shake would be more noticeable - I hadn't thought of it that way round. And as a result of this it means that the end enlargement should also be taken into account, if you are enlarging to an A2 poster then you might want a higher shutter speed than specified by the rule to get the sharpest image possible (if sharpness is what you are after). If you are only going to print a 7x5 then you don't need to worry as much as the image will be small and appear sharp even with a small amount of shake.

Ultimately, as you say, it is only a guide, and there is nothing scientific about it. How much shake you get depends as much on technique as anything else.

[paulc1]

I like the helicopter shot, and think that the rotors have just the right amount of motion blur to tell the viewer that it is moving, but frozen for inspection at leisure....great shot