That's all well and good when there is photo to write about, but what about the other days of the year? A quick post saying xyz about a lens and is good.
Writing a blog post just so you can say I made my blog post this week may actually make people stay away from your blog.
If you continually post things that are irrelevant to them and what they want to know people will stop coming by to see what you have to say.
Kinda like the story of the boy who cried wolf to many times after awhile people just didn't listen to him at all.
If your content is quality and relevant to what people want to know then its certainly worth the wait.
If you have seen the blog of photographer Ben Horn
http://www.benhorne.com/ Ben takes several photography trips each year with his 8x10 camera. He documents these with video. Obviously with 2 or 3 trips a year he is not going to have content to post every week. But because his content is so good and he makes people feel like they went on these trips with him people still follow him. After he is home from a trip it's about a month or more before he starts to post the videos and blog posts, at that point he released a video for each day of the trip once a week. But once that trip is done it may be several months before you hear from him.
When your blog is not as frequent and contrary to the belief of some not all blogs need to be you should allow people to sign up for a news letter that you email out.
When I get Ben's email about his latest trip I know to start looking each week for a new post.
The same principle can be applied to a wedding and portrait business. People are not looking to have professional photos taken of them every week so they a probably not going to keep checking your blog every week. So maybe you just post every month or two and offer a news letter. A month or so before the senior portrait season you post about how to make your senior portraits stand out from others. Two or three months before Christmas you do a post on what makes fun interesting Christmas card photos. At the beginning of spring you send one out about the importance of a nice family photo. And of course through out the year you mix in posts about wedding photos and other types of photos.
So many people have been told so many times that they must do blog posts weekly or even multiple times a week. Now that may work really well for some types of blogs but NOT for all types of blogs.
If you post boring content that is not relevant to your target audience just so you can have a post once a week eventually people are going to stop following you.
thank you!
I made the necessary changes. My English is American, other than the it's its it's all good! 
