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| Thread ID: 34329 | 2003-06-10 02:34:00 | OT Question for the photographer. | nomad (3693) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 151459 | 2003-06-11 07:35:00 | Something screwy here Nomad.. One would expect a big difference in depth of field between f4 and f22. You are using a SLR camera. What is displayed in the viewfinder? How do you normally check focus? Can you see the sharpness of both foreground & background of the image. At f22 with greater depth of field, you'll need to adjust the lens focus about half way between fore & back. Check in the viewfinder. |
Bazza (407) | ||
| 151460 | 2003-06-11 07:36:00 | To check depth of field on an SLR you usually need to push a small lever by the lense known as "preview". Alternatively there may be some other means of selecting preview so check the manual or ask at a camera shop. Sometimes pressing the shutter halfway will stop the lense down to your chosen setting. You see no difference in the viewfinder at the moment because the lense is staying wide open to allow easy focussing. Cheers Billy 8-{) |
Billy T (70) | ||
| 151461 | 2003-06-11 08:44:00 | Spot on Billy, of course, this may be why Nomad cant observe the focus differences in the viewfinder. What say Nomad. Have you read the manual? |
Bazza (407) | ||
| 151462 | 2003-06-11 09:24:00 | the manual is kinda small. does not talk about previewing... there's no button on the cam for preview. its jus a entry cam. i was sitting in the sun room trying to view the back of my yard. could not see any diff. i was on manual mode with AF. it was at 35mm lense setting. it was a cloudy day - not that it matters. i however used AF and focused onto my hand the background was blurry - but this was on all the F's I tried it on... but using the F, I cannot... I have read about it on books and the web. control the aperture and wah - lah. but something is not right. i jus tried it. in front of computer. i turned around set it as manaul at 1/45 F4 and F22 i used AF focussed onto a book in a arms length the background (book shelf) was still blurry on both occasions. do i use MF? |
nomad (3693) | ||
| 151463 | 2003-06-11 09:29:00 | this is wrong man... sorry being so bad at this.. i used MF on both occasions at 1/45 F4 and F22 I can blur dependin on the focus i can blur the back and fore ground. i can blur the back with F4 and F22. this should not be happening..... |
nomad (3693) | ||
| 151464 | 2003-06-11 09:31:00 | If there is no "preview" mode on the camera, then you can not - will not - succeed in seeing the difference through the viewfinder with F stop settings. That is, as Billy T has clearly pointed out above, because the camera will only "apply" the selected F stop when it actually takes the photo, or if a prieview button is available, when it is pressed. Until then, the lens is "wide open" to allow you to focus the camera. So no changes will be seen through the viewfinder. |
godfather (25) | ||
| 151465 | 2003-06-11 09:35:00 | Nomad. what make & model is your digital slr. gerry |
gerrypics (323) | ||
| 151466 | 2003-06-11 09:50:00 | Hi Nomad The guys above have given you excellent advice . When I was learning to use an SLR camera I used to bracket the shots, eg, I'd select what I thought was the setting for the desired outcome, say sharp focus on a subject with no background, I'd take the shot then sep the setting one (or two), take another shot then change again to one (or two) step below the original shot . Three (or more) shots for each picture gives a very good idea of the changes you made and how light conditions can change rapidly . You need to note your settings for each shot though and match those up with the finishes product . Lots of photo's and heaps of $$ . I used to take alot of B&W photo's and get proof prints done . B&W is good for playng around with diff speed film too . Get quite diff mood from fast (grainier) or slow (finer) film . I started out with an old Rusky camera, a Zenit E, everything was manual, no such thing as aperture or shutter prioity, didn't even have a battery if I remeber right . Moved up to an Olympus OM1 with three diff lenses then got engaged and started saving . Have fun . Murray P |
Muzzer (238) | ||
| 151467 | 2003-06-11 10:00:00 | Well, Nomad, I give up. Many here have tried to help you. If your manual is inadequate, and you cant find any 'preview' option as Billy explained, then it is pointless to expect meaningful results from your experiments with the viewfinder. Using the autofocus will not help with acheiving greatest depth of field. Refer to my earlier post, where I said to set lens focus about half way. Of course this needs to be done in MF. If you are in AF, depending on where you point the camera, it may focus on the far point or near point, and so makes one or the other out of focus. It's all so much theory, and if you dont want to use film to experiment and learn, then you need to sort the viewfinder as Billy said for meaningful results. Goodluck. |
Bazza (407) | ||
| 151468 | 2003-06-11 13:27:00 | this no preview mode, its a Canon EOS 88 - entry |
nomad (3693) | ||
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