Replacing Beginner Lenses

Bassat wrote in post #18362587
The G12's DOF results from using a 6.1-30.5mm lens. Mount a 6.1mm lens on a FF camera and you'll get the same DOF. Shorter lenses produce deeper DOF. That is physics/optics at work.

Check out
https://en.wikipedia.o​rg …hip_of_DOF_to_f​ormat_size

Archibald wrote in post #18362630
Check out
https://en.wikipedia.o​rg …hip_of_DOF_to_f​ormat_size

Thank you for backing me up. Notice it says that DOF is different because focal length required to get the same shot is different. Focal length and aperture affect DOF, the sensor size does not. Exactly what I've been saying for two pages.

Excerpt (I added the bold to existing text):
Relationship of DOF to format size

The comparative DOFs of two different format sizes depend on the conditions of the comparison. The DOF for the smaller format can be either more than or less than that for the larger format. (my comment: because sensor size is NOT the determining factor) In the discussion that follows, it is assumed that the final images from both formats are the same size, are viewed from the same distance, and are judged with the same circle of confusion criterion. (Derivations of the effects of format size are given under Derivation of the DOF formulae.)
"Same picture" for both formats

When the "same picture" is taken in two different format sizes from the same distance at the same f-number with lenses that give the same angle of view, and the final images (e.g., in prints, or on a projection screen or electronic display) are the same size, DOF is, to a first approximation, inversely proportional to format size (Stroebel 1976, 139). Though commonly used when comparing formats, the approximation is valid only when the subject distance is large in comparison with the focal length of the larger format and small in comparison with the hyperfocal distance of the smaller format.

Moreover, the larger the format size, the longer a lens will need to be to capture the same framing as a smaller format (my comment: changing focal length changes DOF, and again, the sensor size does not). In motion pictures, for example, a frame with a 12 degree horizontal field of view will require a 50 mm lens on 16 mm film, a 100 mm lens on 35 mm film, and a 250 mm lens on 65 mm film. Conversely, using the same focal length lens with each of these formats will yield a progressively wider image as the film format gets larger: a 50 mm lens has a horizontal field of view of 12 degrees on 16 mm film, 23.6 degrees on 35 mm film, and 55.6 degrees on 65 mm film. Therefore, because the larger formats require longer lenses than the smaller ones, they will accordingly have a smaller depth of field. Compensations in exposure, framing, or subject distance need to be made in order to make one format look like it was filmed in another format.

DOF has been fully understood for 100 years. Today, 100 years later, it still is not understood.

DOF is a little bit complex because it is the interaction of several variables. Because of this, it is possible to make statements about it that sound wrong, yet are correct - or make correct statements that sound wrong.

Here is an example. DOF is the same at all focal lengths and distances, and depends only on aperture, for the same framing and format size. Check it out.

matthewm wrote in post #18362644

[GIFS ARE NOT RENDERED IN QUOTES]

Point taken.

matthewm wrote in post #18362644

[GIFS ARE NOT RENDERED IN QUOTES]

.......oh heavens yes........

johnandbentley wrote in post #18360574
Plus he still would have his original lenses.

Actually, I wouldn't. I eventually plan to sell my 350D and the other two lenses to a friend with no digital camera and a small budget for buying one.

seems like you could sell the 350D/XT with one lens....... AND sell the 650D/T4i with the other lenses, and have enough cash to buy a used T6i or 70D with a couple of good lenses

DreDaze wrote in post #18361632
What gives you the impression that the op is an event, portrait, or wedding photographer? If they're not, then low light shooting may be no concern to them

Good points, since I'm none of those.

Low light capability is NICE, but it's not a critical criterion. About the only place where it comes into play is when I'm shooting in the Cleveland Metroparks, which are generally ALWAYS in shade. Even then, a minor tweak to the ISO fixes most problems with little degradation in image quality.

Temma do you basically shoot landscape? When you discover the capabilities of a newer camera or have capable lenses you will find your style of photography can change.

You're currently not finding uses for higher ISO capabilities but when you do you will transform your style as it sounds like you're just starting out in the photography world.

LonelyBoy wrote in post #18362289
Yeah, if I were the OP I wouldn't want to partake in this thread anymore either! "Equivalency" threads on photo forums are just absurd wastes of time.

I just lost track of the thread while following others.

There have been a few useful posts amid the "trainspotting"...

azsportpilot wrote in post #18362410
congrats on the new job and presumably increased income

No new job yet. just a lot of nibbles.

azsportpilot wrote in post #18362410
why not treat yourself to the latest T7i with a couple of brand new stabilized lenses, the STM is really quiet focusing while shooting videos

See above. No money to build my macro table, nevermind buy a second, more expensive body plus lenses in a year.

azsportpilot wrote in post #18362682
seems like you could sell the 350D/XT with one lens....... AND sell the 650D/T4i with the other lenses, and have enough cash to buy a used T6i or 70D with a couple of good lenses

I'm currently unemployed. I don't need to be buying anything more expensive than PVC pipe for DIY accessories, and have held off on that.

AlanU wrote in post #18362698
Temma do you basically shoot landscape? When you discover the capabilities of a newer camera or have capable lenses you will find your style of photography can change.

You're currently not finding uses for higher ISO capabilities but when you do you will transform your style as it sounds like you're just starting out in the photography world.

Actually, I shoot 80% studio macro. I'm looking to update the lenses I use for everything else, which mostly amounts to still life, casual urban and nature photography, in town and in the local park system.

I started out with a Vivitar 35mm SLR in 1976, so I'm not just starting out.

funny, I had a Vivitar also, many years ago..... was a pretty good camera

weird how some companies that had a large market share in the past have disappeared