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Thread started 26 Sep 2012 (Wednesday) 14:58
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reptile picture help..!!!

 
multicorn
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Sep 26, 2012 14:58 |  #1

Hello this is our first post

We have just bought an eos 450D with stock lense.
We want to photograph reptiles in captivity for our hobby website/growing records etc etc..!!

Similar to this (pictures taken on my phone)

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The problem that we are currently experiencing with the 450D and stock lense is depth of field. All pictures are very narrow focus, extending the f only increases the exposure therefore blurring even more..!

questions:

is the stock lense limited to a certain distance ? ie Macro we shoot at around 500mm-1000mm usually

What lense do people use or recommend for live maro photography.??

I currently get better photo's from a phone why ??

Macro, wide angle, HELP...!!!!!!!

Thank you for any responses
Martin



  
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TSchrief
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Sep 26, 2012 15:06 |  #2
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The only way to increase DOF is to stop down the lens. Shoot at f/8 to f/16. Raise ISO if necessary. Add a flash, but do NOT use direct flash on these subjects. It will look terrible. What program are you using for processing? Allow me to suggest LR4.1. It is fantastic, and inexpensive. Also, the lens you are using is not one of the best. You may need to spend some $$$ to upgrade your work. The lens would be the last thing I upgraded, though. As you have noticed, the DSLR is a completely different animal than the iPhone. There is a moderate learning curve.


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gjl711
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Sep 26, 2012 15:07 |  #3

A SLR will have shallower DOF than a P/S due to a number of things. It's the nature of the beast. It is not a problem specific to your camera or lens. It's simple physics. We don't have to get into the specifics but if you want more DOF then there are a couple of things you can do. First, shoot at a higher f-stop. The smaller the aperture, the greater the DOF. You will need to compensate by either raising the ISO or add more light, or a combination of both most likely.

You can also focus stack but that is always tricky on moving critters so the first method is easier. Lastly, you can move farther away from the critter and crop, or shoot with a mild tele-lens.


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Paolo.Leviste
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Sep 26, 2012 15:07 |  #4

You would just need more light, as you make your aperture smaller.


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number ­ six
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Sep 26, 2012 15:14 |  #5

Welcome to POTN, Martin.

The difference between your phone and your 450D is the size of the sensor. The tiny sensor in the phone will give much greater depth of field for a given f-stop.

You can get greater DOF with your 450D by shooting in Av mode and selecting a smaller aperture (higher f-number).

What lens are you using? The usual kit lens on the 450D (I think) is the 18-55, which will focus quite close - not an issue in your case, since your shooting distance is 500-1000 mm.

The kit lens should serve very well if you shoot at f/11 or f/16 (for greater DOF).

When shooting at small apertures you'll need more light, not a problem if you use flash. If you're using natural light you'll find your camera (in Av mode) will select a slower shutter speed, which may be a problem if you shoot handheld. If that's the case, choose a higher ISO. I usually shoot at ISO 800 - it gives me great flexibility with aperture and shutter speed with not much noise.

Hope I haven't buried you in the tech terms. ;)

-js


EDIT: geez, all those guys got in ahead of me while I was typing. I lose again. :lol:


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LV ­ Moose
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Sep 26, 2012 15:14 as a reply to  @ Paolo.Leviste's post |  #6

Which is the "stock" lens?

Get a tripod or a flash, or both.

Try f/11. If you go much beyond that, your pictures may not be as sharp.

You asked about a macro lens; do you need true macro for reptile photography? If so, the Canon 100mm L and non-L are both very good.


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weeatmice
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Sep 26, 2012 15:19 |  #7

LV Moose wrote in post #15046327 (external link)
Which is the "stock" lens?

Probably the EFS 18-55mm IS.


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weeatmice
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Sep 26, 2012 15:20 |  #8

Flash is the answer if you want to shoot at a small enough aperture to get it all in sharp focus. Otherwise I'd just suggest making sure the eyes are sharp, same as if you're shooting a person.


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multicorn
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Sep 26, 2012 15:23 |  #9

number six wrote in post #15046326 (external link)
Welcome to POTN, Martin.

The difference between your phone and your 450D is the size of the sensor. The tiny sensor in the phone will give much greater depth of field for a given f-stop.

You can get greater DOF with your 450D by shooting in Av mode and selecting a smaller aperture (higher f-number).

What lens are you using? The usual kit lens on the 450D (I think) is the 18-55, which will focus quite close - not an issue in your case, since your shooting distance is 500-1000 mm.

The kit lens should serve very well if you shoot at f/11 or f/16 (for greater DOF).

When shooting at small apertures you'll need more light, not a problem if you use flash. If you're using natural light you'll find your camera (in Av mode) will select a slower shutter speed, which may be a problem if you shoot handheld. If that's the case, choose a higher ISO. I usually shoot at ISO 800 - it gives me great flexibility with aperture and shutter speed with not much noise.

Hope I haven't buried you in the tech terms. ;)

-js


EDIT: geez, all those guys got in ahead of me while I was typing. I lose again. :lol:

Thank you,
No you didn't lose me you were very easy on the 'tech speak'
right i will give it a go now on those settings.

it is false light (daylight bulbs)

the stock is 18-55mm

LV Moose wrote in post #15046327 (external link)
Which is the "stock" lens?

as above, thanks




  
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multicorn
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Sep 26, 2012 15:46 as a reply to  @ multicorn's post |  #10

ok here is a photo.

f16
iso 800
1/4000

no flash

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generally an improvement but the focus is not quite right on any pont of focus..!!
it is generally out of focus all over.

i have centre point focus on.

Thank you
Martin



  
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LV ­ Moose
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Sep 26, 2012 15:55 as a reply to  @ multicorn's post |  #11

Were you closer to 18 or 55? You should have a deeper DoF closer to the 55mm end and shooting further away.


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5DM2User
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Sep 26, 2012 15:56 as a reply to  @ multicorn's post |  #12

If U don't have the cash for it, sorry forget this writing.
But if U do ? Buy the Canon 100mm/f2.8 Macro lens, the one with IS !
U don't need to change the camera, this lens isn't only for Macro's.
The IS will help U sometimes out of the troubles. And U can keep a bigger distance to snakes !
Again this lens isn't a cheap one, but it is a very good one.
On Youtube a very nice test... forget the camera at this moment...

http://www.youtube.com​/watch?v=njqTFlMiGLQ (external link)


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Sep 26, 2012 16:03 |  #13

multicorn wrote in post #15046482 (external link)
ok here is a photo.

f16
iso 800
1/4000

no flash

QUOTED IMAGE

generally an improvement but the focus is not quite right on any pont of focus..!!
it is generally out of focus all over.

i have centre point focus on.

Thank you
Martin

You do not need 1/4000s exposure for a still/slow_moving snake

Take it down to the 1/250 range

Also, your aperture is too small where you're losing sharpness and resolution from diffaction. f/8 should be a good aperture number to work on.

Keep your ISO as low as possible, ideally 100 if you can.

Google "depth of field calculator" and you'll find lots of tools (also smartphone apps) that can calculate DOF for a given sensor size, aperture and subject distance.

Best of luck


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Sep 26, 2012 16:05 as a reply to  @ 5DM2User's post |  #14

Depth of Field (or Depth of focus) is one of the big things you are going to have to learn about now that you are using an SLR. Your camera phone and many point and shoot cameras have such small sensors that DOF is almost a non-issue.

Start here:
http://en.wikipedia.or​g/wiki/Depth_of_field (external link)

As above, work at 55mm and step back for now. That will help a bit. You should be able to get acceptable results with your kit lens.

Consider investing in a flash or get some better light on your subject so you can do f11 and 1/200th of a second. You shouldn't need much more than that.


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multicorn
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Sep 26, 2012 16:06 |  #15

LV Moose wrote in post #15046522 (external link)
Were you closer to 18 or 55? You should have a deeper DoF closer to the 55mm end and shooting further away.

50/50 between the two..




  
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reptile picture help..!!!
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