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how do closeup filters work

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jagr

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I bought a +4 hoya closeup filter to use with my 717. at wide angle i cannot see any difference when using the filter, also it cannot focus at objects more than 15 cm away, but I can achieve focus at 15cm at full zoom which is great. can someone describe how the calculations work and how is the best way to use the filter, i also have a b300 which i will try sometime together with it
--
Once a 707, now a 717
 
Hi Jagr,

Basically what those Hoya's do is allow you to get the same close-up from a greater distance, thus allowing heaps of light between you and subject allow you to avoid using a flash.....I have photographed many bugs with my HOYA 4+, and I never use a flash....... Skippy (Australia)
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
so how much do you normally zoom in to take those bug shots
autofocus? and how far do you normally take them from
Skippy said:
Basically what those Hoya's do is allow you to get the same
close-up from a greater distance, thus allowing heaps of light
between you and subject allow you to avoid using a flash.....I have
photographed many bugs with my HOYA 4+, and I never use a
flash....... Skippy (Australia)
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege.
(Unknown)
Click to expand...
--
Once a 707, now a 717
 
Generally speaking the most effective way to use the closeup attachment is with max zoom. At max zoom and a +4 (=1/0.25m) you should be able to focus on objects between 19.5 cm and 25 cm, measured from the end of the lense barrel (don't use the macro mode on the camera). At wide angle you should be able to focus anywhere from 25 cm on in from the end of the lense barrel, but magnification will be low compared to using zoom, and you could probably achieve focus without the attachment. I suspect the reason your focus range was limitted at wide angle is because you had the macro mode turned on? This mode should only be used when you need the camera to focus closer at wide angles. I described the calculation method in this post:

http://forums.dpreview.com/forums/read.asp?forum=1009&message=4244561

Carl Brune
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
 
Well.......that varies........sometimes it's about 12 inches away, sometimes it's even further, sometimes its closer, depends what type of bug I have at the time and if I'm going for a full body shot or just the upper part of the bug, I do more watching than shooting I tell you, especially if the bug is alive because it's not often they will just sit still.

I have recently ordered a MACRO lens, it has not arrived yet, but when it does I will be sure to post some images and see how different it is to the HOYA 4+.....hopefully my order will be in next week.
Skippy (Australia)
jagr said:
Skippy said:
Basically what those Hoya's do is allow you to get the same
close-up from a greater distance, thus allowing heaps of light
between you and subject allow you to avoid using a flash.....I have
photographed many bugs with my HOYA 4+, and I never use a
flash....... Skippy (Australia)
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
Click to expand...
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
i find that with the +4 the camera is unable to achieve focus even in manual focus at distances above 10 inches, i do not think its the macro mode since i used manual focus.
hmmmm
Skippy said:
jagr said:
Skippy said:
Basically what those Hoya's do is allow you to get the same
close-up from a greater distance, thus allowing heaps of light
between you and subject allow you to avoid using a flash.....I have
photographed many bugs with my HOYA 4+, and I never use a
flash....... Skippy (Australia)
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
Click to expand...
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege.
(Unknown)
Click to expand...
--
Once a 707, now a 717
 
in his other thread. As he says, make sure that you do not have the Macro Mode turned on.

-Ed () W.

" The most exciting phrase to hear in science, the one that heralds new discoveries, is not Eureka! (I found it!) but rather, 'hmm.... that's funny...' " —Isaac Asimov
http://www.pbase.com/ewaldorph/dpreview
Sony F505v w/Canon 500D +2 Diopter lens
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
 
Close-up filters change the diopter of the lens (similar to the diopter adjustment of the viewfinder for people who wear glasses, but for the camera itself -- it changes the focus range). This enables you to focus at a closer distance to the subject than you would without a close-up lens. A +1 filter adds 1 to the diopter (I don't know if saying times is propper here, so I'll leave it as adds), a +2 filter adds two to the diopter, etc. Because of the diopter adjustment when using a close-up filter, you will not be able to focus at normal distances -- close-up filters are for macros only, so it doesn't surprise me that you can not focus on anything further than 15 cm away when using a +4 close-up filter.

If you need me to explain it differently, just ask here or e-mail me.
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
--
dgrogers

http://www.pbase.com/drog
 
Here you go Jagr,
http://forums.dpreview.com/forums/read.asp?forum=1009&message=4331701
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
Hi Carl,

Wow what a small world........my dearest friend lives in Ohio, and her daughter goes to the University that you teach at, I was in Ohio for almost 2 months just 12 months ago.......I even got to go to Athens to the University too :) yup.....it's a small world :)
Skippy (Australia)

--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
what kind of distances do you shoot at when you use the b300 with the hoya
Skippy said:
jagr said:
I bought a +4 hoya closeup filter to use with my 717. at wide angle
i cannot see any difference when using the filter, also it cannot
focus at objects more than 15 cm away, but I can achieve focus at
15cm at full zoom which is great. can someone describe how the
calculations work and how is the best way to use the filter, i also
have a b300 which i will try sometime together with it
--
Once a 707, now a 717
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege.
(Unknown)
Click to expand...
--
Once a 707, now a 717
 
Hi jagr,

Ummmmmm I think there may be some confusion here, the B300 was not used with the Hoya 4+.

The 4+ was used on it's own to do the butterfly shots, I was about 10 inches away, as the butterfly was large.

The Lioness shot was taken with the B300 alone, and having to use Digital Zoom, she would have been hmmmmmmm I'm only guessing here 30-40ft away?? ........ Skippy (Australia)
jagr said:
Skippy said:
Here you go Jagr,
http://forums.dpreview.com/forums/read.asp?forum=1009&message=4331701
Click to expand...
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
Interesting to hear that, Skippy. It is indeed a small world. I have only been here in Athens for a little over a year, have also lived in North Carolina and California.

Carl Brune
Skippy said:
Hi Carl,
Wow what a small world........my dearest friend lives in Ohio, and
her daughter goes to the University that you teach at, I was in
Ohio for almost 2 months just 12 months ago.......I even got to go
to Athens to the University too :) yup.....it's a small world :)
Skippy (Australia)

--
Everyone has a right to be stupid. Some just abuse the privilege.
(Unknown)
Click to expand...
 
Hi again Jagr,

I have used the 3+ and the B300 together, main problem using them like that is the weight, it is just too heavy.

In order to do close-ups like that you must use a tripod, because the depth of field is sooooooooo shallow... I've only done a couple of shots using the B300 together with a 3+, but I found I can achieve a better result just using the 4+ by itself, it's much easier to hand hold, and even with this I often use a tripod, you want a sharp image? you use a tripod.
Skippy (Australia)
jagr said:
ok sorry about that but i've read about people using the hoya and
b300 together.
Click to expand...
--
Everyone has a right to be stupid. Some just abuse the privilege. (Unknown)
 
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